Ash wears a new outfit which is different than his previous outfits. He wears a white and blue striped short sleeved loose collared shirt, brown capris with red outlines with baggy pockets and red folded sleeves at the edge of his capris and shades of blue sneakers. His hat is red and black and the Poké Ball design is white. Ash wears a silver Z-Ring until it was later changed into a black Z-Power Ring.
As a member of the Ultra Guardians, Ash wears an indigo and white uniform with light periwinkle accents as the edge of the short sleeves, collar and inlines of his uniform are black. He wears matching indigo gloves.
In "A Young Royal Flame Ignites!", while teaming up with Professor Kukui disguised as Masked Royal as Ash Royal, he goes shirtless but retains his capris and sneakers from his primary outfit and dons a red flame designed wrestling mask with green and light blue with blue designs at the back of his mask. The wrestling mask was given by Kukui before they teamed up together at the Battle Royal.
Ash's sided spike hair has decreased a bit and are rounder, his eyebrows and his spike hair tuft is shorter than usually seen in previously. When he is no wearing his hat, his hair remain the same only more smoother and shorter.
Ash's two lighting bolts-like markings are slightly bigger.
Since entering the Alola region, Ash is shown to be far more enthusiastic than he did in the Kalos region while at the same time kept his determination and his love for Pokémon. While Ash does retain his competence and experience, not getting upset over losing the Trial Challenges and defeating multiple Pokémon at the same time, he displays a considerably more childish and hyperactive demeanor. Although, Ash has become less impatient, especially for Pokémon battles, as he mellowed it out and is willing to wait but he does show it a couple times due to being hyperactive. Also, Ash became less impulsive and is willing to think things over first due to being part of the Ultra Guardians.
Ash greatly respect Samson positive attitude and as a principal at the Pokémon School. However, Ash gets annoyed with Samson puns at times. Ash left Samson Oak Pokémon School to resume his journey but was happy that he attended the school.
Ash respects how much Lusamine cares about Pokémon as he was impressed by how she dedicated her life into helping lost or injured Pokémon. When Lusamine got kidnapped by an Ultra Beast, Ash was the biggest help in saving her when he used a powerful Z-Move to separate her from the Ultra Beast. Ash bid farewell to Lusamine when she alongside her kids left for a journey to find her long lost husband.
Hearing about his accomplishments during his time at the Pokémon School, Ash became impressed with Ilima as he befriended him right away. Ash and Ilima both want to make their Pokémon partners stronger without evolving. During the League, Ash hope to battle Ilima due to not getting the chance to when they first meet as Team Skull interrupted before the battle started and he didn't that chance again when he lost to Team Skull's boss, Guzma, but he was their when he won the League.
During his stay on Ula'ula Island, Ash stay with Acerola and she even help him train to battle the Island Kahuna of Ula'ula Island. Ash and Acerola are good friends with each other. During the League, Ash didn't get the chance to battle Acerola as she lost to Kiawe but she stay to cheer him on.
Ash was able to befriend Mina as he was impress with her pantings and even came to her for help in understanding what one of his Pokémon was feelings. However, Ash didn't battle Mina in the League as she lost to Sophocles but she was their when he won the League.
Ever since first watching him battle, Ash had admired Gladion and constantly wanted to battle him. Initially, Gladion thought of Ash as strange for being so excitable, but quickly recognized his potential as a trainer and the two were able to become good friends and form a friendly rivalry as well. As seen in Family Determination!, Ash insisted to help Gladion find his mother, even though he didn't want his help. During the Alola crisis, Ash and Gladion worked together to help Necrozma and save Alola. Gladion eventually began adapting some of Ash's unconventional battle strategies, and the two had a heated battle in the Alola league finals. Ash said goodbye to Gladion when he alongside his family left for a journey to find his long lost father but not before promising to battle each other again one day.
Ash easily became friends and rival with Hau. Also, Ash and Hau are there to help one another no matter what. During the League, Ash and Hau promised to give their all which they did. Ash was pleased that Hau stay to watch the rest of League and supported him.
Rowlet is the first Pokémon he caught at Alola and usually has him outside his Poké Ball as he likes to sleep inside his backpack. Ash gets annoyed when Rowlet would still sleep whenever he needed his help. Despite this, Ash cares very much for Rowlet and doesn't mind when he sit or sleeps on his head or hangs on his shoulder, although he would sometimes hold him in his arms. Ash left Rowlet in Professor Kukui's care when he decided to continue his journey but he was happy that he said goodbye to him and Pikachu.
Ash has known Lycanroc since he was a Rockruff as they first meet at Professor Kukui's house. They were able to hit it off right away before Lycanroc joined Ash as his second caught Pokémon from Alola. Also, Ash and Lycanroc share a close relationship with each other. After evolving into Lycanroc, Ash began to notice that he doesn't like to get his fur dirty and gets mad really bad. Although Ash didn't take this as an issue at first but seeing that Lycanroc was ignoring his commands was when he realized that he needed to do something about it. Ash helped Lycanroc control his temper by reminding him of the bond they both share together. However, Ash had some doubts about Lycanroc controlling his red-eye-state as he kept telling him to calm down but realize he had it under control this whole time. Realizing this, Ash told Lycanroc how really sorry he was for ever doubting him. Whenever he losses a battle as he takes them personally, Ash gives Lycanroc, even during his time as a Rockruff, encouragement and cheers him up. After deciding to resume his journey, Ash left Lycanroc under Professor Kukui's care but he got the chance to say goodbye to him and Pikachu.
When they first meet, Ash and Incineroar, while he was a Litten, didn't get off to a great start. Ash never gave up on getting Incineroar's trust as he wanted to be his friend. Through determination and kindness, Ash was able to earn Incineroar's trust and they formed a close friendship towards each other. After his mentor, Stoutland, passed away, Ash offered Incineroar a spot on his team which he accepted and become his third caught Pokémon of Alola. While he was a Litten, Ash had Incineroar in his arms and when he evolved into Torracat he was once on Ash's head. Ash and Incineroar both admire the Masked Royal/Professor Kukui and his Incineroar as they look up to them despite the rivalry they have with them. After evolving into his final evolution, Ash was proud of Incineroar as he became a lot stronger. Ash left Incineroar with Professor Kukui when he decided to continue his journey but he did said goodbye to him and Pikachu.
Ash took care of Nebby while it was a Cosmog. Like Rowlet, Ash doesn't mind when Nebby slept inside his backpack. Ash is very close with Nebby and likes holding it in his arms. When it became a Cosmoem, Ash became worried as it hasn't moved at all. After becoming Solgaleo, Ash was both happy and proud for Nebby. When Necrozma took control of Nebby, Ash was determined to save his friend no matter what. Ash closeness to Nebby is shown when they used an exclusive Z-Move together. Before he left for a new journey, Ash got the chance to say goodbye to Nebby when it came to visit him.
Ash first meet Naganadel, as a Poipole, when it with Pikachu and Rowlet were about to be caught by Team Rocket but he with his other Pokémon saved them just in time before the net caught them. When Lusamine suggested having it join his team, Ash liked the idea and explained to Naganadel his intentions which it understood then jumped into the last Beast Ball as it wanted to join him thus becoming the fourth Pokémon he caught in Alola. Ash really cares for Naganadel and he usually had it outside its Poké Ball, during its time as a Poipole. When Naganadel wished to stay at its home world, Ash was sad but understood its reasons for wanting to stay then bid it farewell. However, Ash would see Naganadel again when it came through an Ultra Wormhole to help him but he didn't recognized it at first but when Pikachu showed him the Ultra Guardian pendent it had on it was when he realized that it was Poipole but it evolved. After it help him in the exhibition match against Professor Kukui and had a meal with everyone, Ash bid Naganadel farewell once again but knows they'll always be friends no matter where they are.
Ash was able to form a close relationship with Melmetal when they first meet, during its time as Meltan, after seeing it with Rowlet. When he saw its bond with Rowlet, Ash asked Melmetal if it wanted to stay with him which it happily told him yes. Realizing that Melmetal also wants to go with him, Ash happily accepted it to his team then caught it as his fifth and final Pokémon he caught in Alola. Like both Rowlet and Nebby, Ash doesn't mind when Melmetal, while it was a Meltan, sleep inside his backpack. Also, Ash even doesn't mind when Melmetal, also during its time as Meltan sit on his shoulder or on his head. After evolving, Ash was very proud of Melmetal and was happy how strong it became. Despite their relationship, Ash sometimes gets annoyed when Melmetal will not listen to its command very much and eat any metal that it should't be eating. Ash decided to leave Melmetal with Professor Kukui when he left to resume his journey but it did say goodbye to him and Pikachu.
Ash arrives in the Alola region on a vacation with his Mom, which Mimey won for them. After a nice Sharpedo ride, a run-in with a Bruxish that Lana caught on her line, a race with Grubbin then having some bad luck with a Bewear and some racing Tauros, Ash finds the Pokémon School where he meets Lillie, Mallow and Sophocles. However, Ash gets mistaken for a new student by Mallow and takes him to see Samson Oak, which conveniently leads him to Delia and Mimey. After Delia gives the Kantonian Vulpix Egg to Samson, Ash was shown the rest of the school by Mallow, including the classroom, where he meets Professor Kukui. After the meeting, Ash witness Kiawe, who he saw flying on his Charizard before, being confronted by Team Skull, who challenge him to a three on one battle, with the prize being his Charizard. Ash jumps in to help, defeating the Salandit and leaving the Zubat and Yungoos to be finished off by Kiawe and Turtonator's Z-Move, Inferno Overdrive. After seeing all of this, and receiving a Z-Ring from none other than Tapu Koko itself, Ash decides to stay with Professor Kukui and Rockruff while attending the Pokémon School.
On his first day at school, Ash's new classmates give him some challenges before Tapu Koko showed itself which it takes his hat before realizing it wanted to battle him and Pikachu. During the battle, Ash was shown how to use the Z-Move Gigabolt Havoc by Tapu Koko with Pikachu using the move but the Z-Crystal shatter due to not doing the island trial. After Tapu Koko left, Ash was told of the island trails by his classmates which he decided to take on to get another Z-Crystal with his classmate giving their full support for him. That next day, Ash was given a blank Pokédex by Professor Kukui to get info on the Pokémon in the Alola region.
After receiving his Pokédex, Ash had a Rotom inhabit in it as it changes into a Rotom Pokédex. At school, Ash introduce Rotom Dex to his friends then they all went to go find his first Alola Pokémon catch. While trying to catch a Pokémon, Ash gets a surprise attack by Team Rocket, who tried to take Pikachu again, but failed when the Bewear that he saw when he was exploring on his first day at the region takes them away. Ash was able to catch a Rowlet, his first Alola Pokémon, after befriending it when it got hungry as he instantly bonded with him and they wanted to be with each other.
Ash meets Hala the Island Kakuna of Melemele island where he gives him the task of figuring out on how to get rid of the Alolan Rattata and their evolve from Alolan Raticate as their causing problems on the Island. Through the help of his friends, Ash figured out on how to solve the problem by asking Yungoos and their evolve form Gumshoos for help as they once drove them off before. Ash was taken to Verdant Cavern by Hala where he would take the Island Trail and won when the Totem Pokémon Gumshoos gave him a Normalium Z-Crystal. After wining the Trail, Ash asked Gumshoos along with its allies for their help to take care of the Ratta and Raticate which they did as they were drove off once again. Ash was accepted to do a Grand Trail battle against Hala. After that, Ash was to do his Grand Trial against Kahuna Hala which their battle was a two on two battle. Through the hardwork of Rowlet and Pikachu, Ash won his Grand Trial. However, Ash was about to accept the Fightinium Z-Crystal as his reward but Tapu Koko swapped it for the Electrium Z for him as his reward instead.
Ash catches Rockruff, the Pokémon Professor Kukui was taking care of, after helping it win a battle. Sometime later, Ash and Pikachu got challenged to another battle by Tapu Koko but the force of the battle caused Pikachu to fall off a cliff with Ash trying to save him but Tapu Koko saved them both with no winner. Ash declared that they would get stronger and win the next time they battle. Ash and Pikachu went to an island named Treasure Island to spend time together during which they got to see Tapu Lele, the island guardian of Akala island. Then, Ash and his Pokémon come across Litten, who he's seen a few times before, again but this time he finds it with Stoutland in its new home. Ash sees that Stoutland was trying to teach Litten Fire Fang but with no success. Sometime later, Ash was asked by Litten for his help as its ailing mentor has fallen ill. Ash takes to Stoutland the Pokémon Center but only to find out its nearing the end of its life and wonder if Litten knows. Ash decides to keep them company but finds out that the pair have gone back to their home. After Stoutland passing, Ash with his Pokémon kept Litten company for awhile at its home. Ash became happy to see Litten is feeling better then battled it but with no winner. Despite no winner in the battle, Ash sees that Litten, who wants to grants its mentor last wish, wants to join him then caught it.
Ash came across Gladion, Lillie's brother, thus becoming rivals and good friends. Through Gladion, Ash learns and decided that he will take on the Grand Trial on Akala island to get Rockium-Z so he can use Rock-type Z-Moves. However, Ash was going to get his wish when he and his classmates are gonna take a field trip to Akala island but before they did they meet the Island Kahuna of Akala Island Olivia. Ash then went with Mallow to collect cooking herbs when Totem Lurantis challenged him. Ash won and defeated Lurantis and received the Grassium Z and then ate dinner with his friends, Professor Kukui and Olivia. 
After Ash got the Grassium Z, they challenged Kahuna Olivia with Rowlet and Rockruff while Olivia used Midday Lycanroc and Probopass as their battle is a double battle. After defeating her, Ash received the Rockium Z so Rockruff could use Continental Crush. That night, Ash and Pikachu went looking for Rockruff, who ran off to train, but found it cover in dust from Tapu Lele. After Rockruff got away again, Ash and the co. went to find him with Professor Kukui and Olivia. Ash with his group found Rockruff with Olivia and Gladion’s Lycanroc at the Ruins of Life with Tapu Lele, who tried to heal it but failed the first time. Ash passed out when Tapu Lela used Drain Kissed on him and the two Lycanroc which helped heal Rockruff along with giving the energy back to them. After recovering from the energy drain, Ash witness Rockruff evolved into Dusk Lycanroc right before he and co. went back to Melemele Island with Professor Kukui. After their filed trip, Ash and Lycanroc were using the Rockium-Z against Team Rocket but they failed to do so. After Kiawe took care of Team Rocket, Ash and Lycanroc did some training to help them perfect the Z-Move. Ash did Rockium-Z correctly when Team Rocket came back for another battle against them.
Ash returns to Kanto with his classmates for an extracurricular lesson where he reunites with his long time friends, Misty and Brock. After arriving to Pallet Town, Ash reunites with some of his Pokémon under Professor Oak's care. After dealing with Team Rocket again along with falling asleep from Jigglypuff song, Ash and everyone were treated to a welcome party with his mom there as well. The next day, Ash and everyone headed off to the Cerulean Gym located in Cerulean City, where they got a chance to battle Misty or Brock. Ash decided to battle Misty in a one on one battle with him being the winner of the battle then everyone headed back to Alola that evening also he tells Misty and Brock to come to visit them sometime.
One night, Ash has a dream where he promises the Legendary Pokémon Solgaleo and Lunala. However, Ash could't recall it that next morning. While heading to school, Ash and Pikachu saw Tapu Koko coming back as they follow it then saw an unknown Pokémon which helped him remember the promise he made to the Cosmic duo. Ash brought it to school to show everyone then Lillie nicknamed it Nebby with everyone liking the name and they all agreed to call it Nebby. Ash help find something Nebby would like to eat but it didn't like anything they gave it all until Sophocles provided a bag of star candies with it liked a lot. Ash and Lillie were heading to Professor Kukui house where they see a helicopter on the beach as Professor Kukui explained that they have visitors who want to see them. Ash meets Lusamine, Lillie and Gladion mother, the president of the Aether Foundation along Professor Burnet, Wicke and Faba as they all came to meet Nebby. Ash shows Nebby to Lusamine where she concludes that it's an Ultra Beast then Professor Burnet explains about the Ultra Beast and the battle they had with the Tapu Guardians. Ash tells them the dream he had that night about the promise he made to the Cosmic duo, after seeing an image of the Altar of the Sunne. Although Lusamine and Wicke offer to take care of Nebby, Ash declined their offer due to his promise to take care of Nebby. After Lillie and Professor Kukui assured Lusamine that he is a very trusting trainer as they tell her all the accomplishments he has done in Alola, Ash was allowed to take care of Nebby and Lusamine offer to help him whenever he needed it. Ash has some awesome adventures with Nebby especially when it learned teleport as it teleported him and his friends to various places, minus Lillie. Ash got to go to Aether Paradise with his friends which is where the Aether Foundation is located as he got to Lusamine, Wicke, Faba and Professor Burnet again. By accident when Nebby teleported him, Ash meets up with Gladion again, after he thought about him, with Pikachu and Lycanroc where he meets his Type: Null, nicknamed Silvally. Ash tells Gladion that Lillie is doing well also during the conversation Gladion explained why Lillie's afraid of touching Pokémon, due to an Ultra Beast attacking Lillie back when she was little, and his Silvally saved them. Ash wonders why Lillie never explained this but Gladion believes the trauma she suffered caused her to repress the memory of those events. Ash was asked a lot of question by Gladion as he is curious as to why the Cosmic duo chose him to take care of Nebby, about his Dusk Lycanroc, what powers does he possess and what kind of influences does he have on Pokémon. However, Ash doesn't have all the answer to Gladion questions but decided to have a battle, as Team Rocket interrupted before, as he believes this will help him answers his questions. Understanding the idea and accepting his challenge, Ash with Lycanroc put up a good fight against Silvally but lost then Gladion understood more about him also he has him promise not to tell anyone he saw him also about Silvally, especially Lillie, which he understood and promised he won't say anything.
Ash was hanging with Professor Kukui and Professor Burnet, who came to give Nebby a check up, along with his Pokémon. Then Kiawe, Lana, Lillie, Mallow and Sophocles came over as they are having a sleep over at Professor Kukui house. Ash invited Professor Burnet to join them and she gladly accepts as everyone gets settled in. Ash suggested having a contest to see who gets to sleep in the loft, as Sophocles and the girls want to sleep up there, with finding Nebby being the contest. After the contest, with the girls being the winner due to Nebby pooping out of Lillie's hat and into her arm freezing her in fear, they play a game call Z-Posses one, two, three but Kiawe got carry away and used Inferno Overdrive messing up the place. Ash, Mallow, Lillie and Professor Burnet make dinner while Professor Kukui has the rest help him clean up the place. Just when everyone was about to eat, Professor Burent's Munchlax swooped in and ate everything promoting the two Professor to go out to get something to eat for everyone while the others wait. While waiting, Ash and everyone decided to some training for Pokémon battle to help them forget how hungry they were. After eating, they all talked about how amazing Professor Burnet is along with talking the about the homemade food at Kiawe and Sophocles place, right before going to sleep for the night. The next day, everyone is walking along then Ash and everyone became stunned when Lillie could't touch Pokémon again even Snowy, as Nebby teleported her to Gladion's location where she saw his Type: Null which triggered a memory from her past. At night, Ash was at the beach getting scolded by Gladion for having Nebby bring Lillie to where he was then apologizes for it's action. The next day at school, Ash and everyone cheer Lillie up then witness her try to touch Snowy but got scared. However, Ash and everyone praised Lillie for her courage. After school was done, Ash, Nebby, Pikachu and Rotom decided to take a walk with Lillie and Snowy. While walking, Ash was asked by Lillie if he saw Gladion which he admits that he did see him as he explains that he didn't want her to see Silvally then told how upset he was which got his friend to laugh due to knowing her brother. Ash hears Lillie tell him that when she saw Silvally it brought back a memory from her past. Not wanting to see his best friend down, Ash cheers Lillie up by having Rotom show a video of Pikachu doing an imitation which worked. However, Ash also unknowingly encourage Lillie to not give up on getting over her fear of touching Pokémon as she decided to remember her past then they were all teleported by Nebby, who decided to help her. Being teleported from one place to another, Ash got to see all the places Lillie and her family did together before her mother, Lusamine, got busy with her work. Ash with everyone were then teleported to Lillie and Gladion childhood room located at the Aether Foundation. After being teleported to Lusamine room, Ash realized that Nebby wants to grant Lillie's wish as she wanted to remember everything then they were brought to the Aether Foundation basement which is strictly forbidden other then Aether Foundation employees. While going through the basement further, Ash, Pikachu, Nebby and Snowy, minus Rotom, were pushed into a wall by Faba's Pokémon as Lillie was grabbed by Faba, who didn't want her to remember her past. Ash, Nebby, Pikachu and Snowy tried to save Lillie, minus Rotom as it went go get some help by pulling the alarm, but Faba's Hypno hold them down with Psychic. Ash with everyone were rescued by Gladion and his Silvally then became glad when Lillie, who remembered everything from her past, touch Sivially thus putting an end to her fear of touching Pokémon for good. Ash told Lillie how happy he was for her then was thanked for his help.
After helping Lillie get over her fear of touching Pokémon, Ash, Gladion and Lillie went back to Aether Paradise when Nebby got kidnapped by Faba, who wanted it to open an Ultra Wormhole. Meeting up with Lusamine, Ash and everyone were able to rescue Nebby but it evolved which caused the Ultra Wormhole to open. Ash and everyone see Nihilego come out of the Ultra Wormhole then became stunned when the Ultra Beast took Lusamine away, who sacrifice herself to protect Lillie and Gladion. While heading back to Melemele Island, Ash offer to help Lillie and Gladion find Lusamine. However, Ash was told no by Gladion as he tells that this situation is a family matter. After arriving back to Melemele island, Ash heads back to Professor Kukui house for the night. The next day, Ash was still worried about Nebby as it hasn't moved since it evolved then Kiawe, Lana, Mallow and Sophocles came over to check on him. Ash tells his friends about what happed at Aether Paradise as they became shock that Lusamine was taken away through an Ultra Wormhole then they all hear more shocking news as Hobbes comes in with Professor Kukui to tell them that Lillie and Gladion are gone. Knowing that their trying to find a way to rescue Lusamine, Ash and everyone heads over to Hala house for some idea on where their at. Hearing Hala explain about the Altar of the Sunne and about Solgaleo, Ash remembers being their in a dream where he promises the Cosmic duo that he would take care of Nebby. Ash and everyone head to Poni Island, where the Altar of the Sunne lies, to catch up with Lillie and Gladion as they want to help rescue Lusmaine. After catching up to Lillie and Gladion, Ash tells them their reason of being here despite Gladion telling him again that's its a family matter but Ash and Lillie were able to change his opinions as he lets them come along in their quest to rescue Lusamine. While looking for Solgaleo, as it can open Ultra Wormholes, at the Altar of the Sunne, Ash and everyone come across the Tapu Guardians instead, surprising them.
Ash became amazed and shocked when the Tapu Guardians showed him and his friends that they were the ones who brought Nebby to Melemele island for him to find and take care of. Later, Ash became excited when Nebby evolved into Solgaleo then was given a Solganium Z, as they needed to use a Z-Move to make an Ultra Wormhole. However, the Z-Crystal didn't fit Ash's Z-Ring so the Tapu Guardian encases it for him then gave it back to him. Ash, Gladion, Kiawe, Lana, Lillie, Mallow and Sophocles all get on Solgaelo's back then Ash performs Searing Sunraze Smash. After performing the Z-Move, Ash and his friends enter the Ultra Wormhole, leaving both Professor Kukui and Professor Burnet, who also arrived to Poni island to help them rescue Lusmaine, behind. Making it to the dimension where Nihilego lives, Ash and everyone find Lusmaine fused with Nihilego but they were blocked off by Lusmaine's Pokémon, who were stopping them from getting close to her as everyone, but Ash, Pikachu and Solgaelo kept going while the others battle the Pokémon.
Ash with Pikachu and Solgaelo were able to get to Lusmaine as they tried to save her. Just when Ash was having a hard getting through to Lusmaine, Lillie and Gladion come to Ash's aid. Ash became shock when Gladion tells him that they need to stop Nihilego and free Lusmaine because her Pokémon will keep getting back up without end. While Solgaelo goes to help the others, Ash and Glaidon hear Lillie give a speech to help get through to Lusmaine which worked but Nihilego refused to let her go. Ash's Electrium-Z temporary transforms into Pikashunium-Z then he and Pikachu performed the Z-Move 10,000,000 Volt Thunderbolt which stop Nihielgo and freed Lusmaine and her Pokémon. Ash, Gladion and Lillie reunite with their friends as he tells them that they were able to save Lusmaine then returned to the Altar of the Sunne where they reunite with Professor Kukui and Professor Burnet.
Ash wonders where Solgaelo, Nebby, is, as it returned to the wild, as it left without him giving a thank you for its help then greets Lillie, who took some time off from school to be with her mother, as she thanks him and everyone for their help in rescuing Lusamine. Later at Professor Kukui house, Ash became stunned but happy that Professor Kukui and Professor Burnet are getting married. The next day, Ash tells Kiawe, Lana, Lillie, Mallow and Sophocles about the news, much to the girls joy. Although the girls were hoping for a weeding, Ash tells them and the rest of the boys that the Professors aren't gonna do a weeding ceremony, disappointing the girls. Ash, Kiawe and Sophocles were in on girls idea of doing a surprise wedding as a gift for the Professors. The night before the wedding, Ash was approach by Gladion and tells him that he gonna do the other Islands Trials but does ask him to congratulate the Professors on their marriage for him then leaves. Ash goes to wake up Professor Kukui at his house then brings him outside to see that they have a wedding as Professor Burnet tells them that its a gift from his student which makes him very happy that his students did this for them. Ash attends the weeding then Lusamine came to them and asked to join an elite group call the Ultra Guardians which they all accepted also they got to see Solgaelo, Nebby, flying up in sky where Ash gets his chance to thank it for its help and know he'll see it again one day. Ash goes to Ula'ula Island for the very first time with his friends as they arrive at Mount Lanakila where Hala's Crabrawler is gonna evolve into Crabominable. Later on their trip to Mount Lanakila, Ash participated in the PokéSled Jump tournament where he tried to use his Z-Move Gigavolt Havoc for his performance but failed. Ash was pleased to see that Hala won the tournament and got to see the prize he won, a sled.
Ash was at school where he, Kiawe, Lana, Lillie, Mallow and Sophocles got their first Ultra Guardian mission where they have to catch a Buzzwole then return it to its home. The Ultra Guardians with their Ride Pokémon then headed over to the Melemele Meadows due to being the location where Buzzwole is. Ash found Buzzwole and battle it but he stop the battle when its was showing off its muscles then he decided to join in with Pikachu and Kiawe joining him as well. When the girls and Sophocles showed up to their locations, Ash caught Buzzwole then the Ultra Guardians returned it to its home but not before doing a muscle pose as a way of saying goodbye to it. While at Professor Kukui house, Ash with his Pokémon watch a Battle Royal battle which impress him, especially the Masked Royal, Professor Kukui's altar ego. Ash went to the Battle Royal Dome with his friends but Litten went up on the stage as it wanted to battle the Masked Royal's Incineroar, who happens to be Litten's final evolved form. Thanks to Litten, Ash with Kiawe and Sophocles got to battle the Masked Royal but they lost. That night at the beach, Ash told Litten that they should battle the Masked Royal again then decided to train as they want to help Litten learn a new move, Flame Charge. After days of training, Ash with his fiends see that the Masked Royal came to them then had another battle with him where Litten evolved into Torracat, who also able to perfect Flame Charge in the process. However, Ash lost to the Masked Royal again but was proud that Torracat gave its all in the battle. Later on, Ash meets llima, a graduate of the Pokémon school, as he came to visit due to him studying at the Kalos region. Ash and everyone were explained by llima about one of reason why he came back to Alola is that he wants to get a Z-Crystal pacifically for his Eevee. Hearing that llima wants to make his Eevee stronger without evolving, Ash tells llima that he can also relate as he wants Pikachu to become stronger the way he is as well. Ash and llima were gonna have a battle but was interrupted by Team Skull but got to his Z-Move then they both to have a battle another time. Ash with his friends were taught Poké-Ping Pong by llima, who won a lot of Poké-Ping Pong tournaments, then got to cheer him on in a Poké-Ping Pong tournament he participating in, which was the other reason why he came back to Alola for, where he won the tournament. Ash and friends got to say goodbye to llima as he was gonna explore the islands then head back to Kalos. Ash with his classmates were listing to Sophocles give a presentation of the Hokulani Observatory that his cousin, Molyane, runs at Mount Hokulani on Ula'ula Island also Professor Kukui told the class that Sophocles cousin is a friend of his. Ash suggests to Professor Kukui that they should make a filed trip to Hokulani Observatory sometime. After the presentation, Ash and his friends were getting ready to have lunch but see Pikachu is not present then they all search for him. When Rowlet left campus to keep searching for Pikachu through the air, Ash with his other Pokémon left campus as well to go look for Pikachu by ground. Ash found Pikachu with Rowlet and an Ultra Beast were about to be captured by Team Rocket but he with his Pokémon arrived just in time to save them. After dealing with Team Rocket, Ash brought the Ultra Beast back with him as it was given the name Poipole also Lusamine assigns him to be its partner until they can find the Ultra Wormhole it cam from. Ash showed Poipole how Poké Ball works as it believed that he was playing with it. After showing his intentions, Ash made one final attempt to catch Poipole but jumped right in as it already grew found of him and his Pokémon. Ash with his Pokémon were all playing at Professor Kukui house then became impressed when Poipole drew a picture of Pikachu. Ash, Kiawe, Lana, Lillie and Mallow all go with Sophocles to Bamboo Hill as he made a discovery while camping with his parents. Ash and everyone all dug it up as they spent hours doing it then they all came to conclusion that its an Ultra Beast when they dug it up all the way. The next day, Ash with the girls and Kiawe became shocked when Sophocles told them that the Ultra Beast was in the ground for two hundred years then they were called for an Ultra Guardian mission. After explaining to Lusamine that they already knew about Celesteela, the Ultra Beast name, as they told her they dug it up the other day, Ash and the rest of the Ultra Guardians headed back to Bamboo Hill so they can Celesteela get home. However, Team Rocket tried to steal Celesteela but they were stopped. Ash, Kiawe, Lana, Lillie, Mallow and Sophocles waved goodbye to Celesteela as they were able help it to blast off then it flew to the moon, due to the Ultra Wormhole it came from being there.
Hearing Professor Kukui dream about making a League in Alola, Ash gets fired up. Ash left by boat for Ula'ula Island so he can do its Grand Trail. After arriving, Ash meets the Island Kahuna of Ula'ula Island Nanu and his friend Acerola also through her he got to hear a tale about the Radiant One, who brought light to Alola. Ash did a Pre-Trail battle against Nanu but lost when Lycanroc, who goes berserk when its fur gets dirty, went out of control. Despite Nanu telling him to go back to Melemele Island, Ash decided to stay and train. That evening, Ash decided to go see Tapu Bulu, the Island Guardian of Ula’ula Island, for training through an idea from Acerola. Ash goes to the Ruins of Abundance with Acerola so they can ask Tapu Bulu for help in his training. After going all way to the the top of the Ruins of Abundance, Ash meets Tapu Bulu and asked for its help. Ash was excited when Rowlet learned Razor Leaf when it was struck by the power of the trees Tapu Bulu planted. When it started to rain, Ash played with Pikachu, Poipole and Rowlet then saw Lycanroc going berserk again when Tapu Bulu pushed him out in the rain. However, Ash calmed Lycanroc down by reminding him the bond they both share and that he really cares about him for exactly the way he is. After that, Ash with Lycanroc battled Tapu Bulu where it learned Stone Edge but the battle was called off by the Island Guardian. Ash was pleased by the training he did with his Pokémon as he and his everyone were given Oran Berries by Tapu Bulu.
Ash goes to Nanu for a Pre-Trail battle rematch which he agreed to do for him but his opponent is at the Thrifty Megamart, an abandoned site. Ash with Acerola, who's referring the battle, go the site Nanu told them to go but they find that Team Rocket is also their. Ash become shocked to hear that the Team Rocket trio are is opponents for his Pre-Trail rematch but he accepts the challenge. Ash ended up wining when Pikahcu learned Electroweb and used 100,000,000 Volt Thunderbolt again to win the battle. After Nanu arrived at the Thrifty Megamart, Ash is accepted to do a Grand Trail battle with Nanu. Arriving back to the Ruins of Abundance for his Grand Trail battle, Ash became surprise to hear that Nanu Grand Trail battle will be a one on three battle but he accepts his terms as he uses Lycanroc for his battle. However, Ash wasn't sure that Lycanroc had his rage under control as he told it to calm during the battle. Ash became upset when Nanu, who realizes that he was doubting his Pokémon, insults his skills as a Trainer but Lycanroc tackled him as it not only wanted to get him to clam down but to show that he's been under control of its red-eye state this whole time. Seeing this, Ash apologizes to Lycanroc for doubting him and for letting Nanu insults go to his head. After exchanges of Z-Move, Ash won the Grand Trial and was given Lycanium Z, a Z-Crystal pacifically for Lycanroc, then headed back to Melemele Island that evening. One night, Ash with his friends watch a firework display where they also saw a weird looking being as a ball came up into the air then it reforms itself and watch it perform then kneeled and left. The next day, Ash and everyone were talking about the performances the other night also they theorizes that the being might be an Ultra Beast which was proven right when they were called for an Ultra Guardian mission. While tracking Blacephalon, named of the Ultra Beast, they saw another Ultra Beast named Xurkitree absorbing electricity at a power plant. After Blacephalon arrived at the site, Ash and the rest of the Ultra Guardians watch them do a performances battle. Ash came up with the idea of doing their own performances then he would do a Z-Move to finish the job. The plan worked as Ash and the rest of the Ultra Guardians were able to catch them then send them back to their rightful homes. Later at school, Ash became surprise to hear when Professor Kukui told him and everyone in the classroom that the event venues want them to repeat their performances from the other night which got them wondering if they can repeat it. Returning to Ula'ula Island for a field trip to the Hokulani Observatory located at Mount Hokulani, Ash, Kiawe, Lana, Lillie and Mallow all meet Molayne, Sophocles cousin and Professor Kukui's best friend. Ash with Kiawe and the girls were given a tour of the Observatory then they got to look at the telescope. Later, Ash became amazed by the Minor at Starfall Hill where his Poipole found one still in its shell then he and Kiawe brought it back the Observatory. After Minor shell was able to open, Ash and everyone spent the day playing with it but when night fall they saw more Minor then saw them all fade away even the one they were playing with. Ash comforts Poipole, after seeing the Minor it befriended faded away, then saw a Rayquaza in the sky. After their field trip at the Hokulani Observatory, Ash with his Rowlet and Kiawe ended up getting separated from everyone when they were taking a short cut to get back to Melemele Island. However, Ash, Rowlet and Kiawe got lost but they found their way out where they reunite with their Pokémon and Lana. Later, Ash, Kiawe and Lana reunite with Lillie, Mallow and Sophocles as they told them about their adventure in an ice cave they found and about Lillie being in a double battle also they told them that the latter got an Icium Z which she show to them. Ash, Kiawe, Lana, Mallow and Sophocles all hope to see Lillie do a Z-Move someday then they all headed back home.
Ash was at Professor Kukui's house with his Pokémon and Professor Burnet where they watch the Battle Royal match between the Masked Royal and Mr. Electric as he is part of a group called the Revengers. After Mad Magma another Revengers member interfered the match, Ash and Professor Burnet both agreed that the Masked Royal didn't want to win by default. Ash gets excited when Professor Burnet tells him that both of them and Professor Kukui are going to the next Battle Royal match, after the Masked Royal gets challenge to a match by Mad Magma. That next day, Ash with both Professors arrive at the Battle Royal Dome where they meet up with Kiawe, Lana, Lillie, Mallow and Sophocles as they all came to watch the match as well. After watching a different match, Ash and everyone, minus Professor Kukui, all get excited for the main battle but more Revengers interfered. Ash left the audiences to get his Torracat as it left to go help the Masked Royal as it had enough of the Revengers tricks. After Viern, who once tried to make Kiawe's family farm a resort hotel, arrives in his car and reveals that he is not only the president of Rainbow Happy Resorts but he is also the big boss of the Revengers, Ash offered to be the Masked Royal tag team partner for a tag team match instead of a one on one match. Ash gets dubbed as Ash Royal, after the Masked Royal gives him a masked to wear before the match, with them calling themselves the Double Royals. The Double Royals were battling really well together until some of the Revengers Pokémon interfered but Kiawe and Lana came to help them. After Torracat learned Revenge, Ash was able to defeat two of the Revengers Pokémon then the Masked Royal finished the rest of them with his Z-Move and they both finished Viern off together. Ash asked the Masked Royal if he and Torracat can battle them again sometime with the Masked Royal accepting his challenge then left.
When Faba from Aether Paradise arrived to give a lesson in Science for class, Ash, Lillie and Sophocles were accidentally shrunk small in size when Faba's invention he brought to show to the class backfired. Ash and Lillie road on Pikachu but ended up getting separated from everyone with Sophocles. While floating through the river on Togedmaru, who ended up getting separated with them, Ash and his friends landed safely to shore then saw how huge Pokémon are due to being small. Ash and Lillie decided to have some more fun being small as they both hung onto a Comfey with Sophocles not far behind with his Togedmaru. After landing onto Anela stand, Ash and his friends ran into a Persian with him recognizing it being the one who bullied Torracat back when it was still a Litten. Ash and his friends were chased by the Persian until Mallow came to their recuse with her Tsareena battling it. After Tsareena betted Persian, Ash, Lillie and Sophocles were reunited with everyone then they returned to their normal size. After arriving back at the Pokémon school, Ash and his friends watch Faba give his invention another go but it ended up making Sophocles' Togedmaru grow bigger in size which didn't last very long. After doing some training with his Pokémon, Ash and the Professors went to do some shopping where they met an artist named Mina and her partner Ribombee, who has the ability to read the feelings between humans and Pokémon. Ash brought his friends to meet Mina then became surprise in the painting she was doing of him and his Alolan family. After Mina's Ribombee reads Poipole feelings, Ash became surprise to hear the reason why Poipole draws is that its showing its feelings as he became happy to see how it express its emotion. After showing Lusamine, Wicke and Faba the info on Poipole, Ash sees Poipole drawing him, the Professors and their Pokémon with lighting shape on them showing how much it loves them with Rotom taking a picture of it. At school, Ash became worried when Poipole draws teardrops showing that its sad then he confronts it. Ash battle Team Skull, who wanted Mina's Ribombee, then ask Mina if she can help understand why Poipole is so sad when Rotom showed her what it drew earlier but all she said was is that it might be carrying a burden as it might be on a quest. Later in the evening, Ash sees Poipole drawing something in the celling and realizes that its drawing the Blinding One, the Pokémon they saw in a book that Acerola showed them back on Ula'Ula Island. Ash believes Poipole likes the Blinding One as well due to him and both Professors not know the answers as to why it would draw it. Ash with his classmates were doing a gym class where they vault horses but when it was his turn he accidentally trips and hurts himself but he assures everyone that he's fine. After school, Ash ran into Viern again where he's working on a tower. The next day, Ash and everyone saw a giant block at the school with them believing to be for class as he tried to get on it but tripped again but he told his friends that he's alright. Hearing Komala ring the bell, Ash and everyone were called in for an Ultra Guardian mission. Ash and the rest of the Ultra Guardians became surprise to hear that the giant block outside of the school is an Ultra Beast, named Stakataka, then went back outside to try to catch it. However, Ash and the rest of the Ultra Guardians ended getting their Beast Ball thrown back at them. Lasting until sunset, Ash and the rest of the Ultra Guardians all decided to try again tomorrow. After arriving at school that next day, Ash and everyone saw that the Ultra Beast was gone then found out that there's Ultra Aura in the city as they all go on their Ride Pokémon to investigate. Ash and the rest of the Ultra Guardians arrived at Viren's construction site where the Ultra Aura is located as they also found the Ultra Beast there as well. After the Ultra Beast started moving, Ash and the rest of the Ultra Guardians realize that the statue Viern's workers put on it is causing it pain. Ash went up onto the Ultra Beast to get the statue off it then kept his balance on it until it calmed down then he asked it if he can catch and promises it to return it to its home. After catching the Ultra Beast, Ash and the rest of the Ultra Guardians witness the Ultra Beast returned to its proper home. Ash and his friends head over to the Pokémon Paradise Resort with their Pokémon as Lusamine got them a reservation for the resort where their Ride Pokémon are require to get treatment over their due to all the hard work they do for them. Arriving at the resort, Ash and everyone have the workers at the resort look at their Ride Pokémon as to what treatment they needed. After sorting out what their Ride Pokémon needed, Ash and everyone headed over to the hot springs to relax before everyone went with their Ride Pokémon to get their respective treatment. Ash with Mallow and their Ride Pokémon go the stress course to help them relief their stress. However, Ash and everyone ended up getting caught in a net by Team Rocket then witness them almost making off with their Pokémon but all the Ride Pokémon saved them. After Team Rocket was taken care off, Ash and everyone headed over to the flower bath.
One morning, Ash notices that both of the Professors are acting very strange when he sees them not their usually happy and upbeat selfs. At school, Ash was inform by his classmates that their parents and Lillie butler, Hobbes, are acting the same way as the Professors are. After Professor Kukui left due to not being motivated to teach class, Ash hears Kaiwe explain about the upcoming Manalo Festival that happens once every twenty-one years. Ash explains how he heard about the Blinding One from Acerola when he was on Ula'ula Island then hears Lillie explain the story to everyone. After school got out, Ash and Kiawe did some training but could't do their Z-Move which got them confused as to why they could't. Later, Ash and everyone sees that the clouds are getting darker then they were called in for an Ultra Guardian mission. Ash and the rest of the Ultra Guardians head over to Poni Island to meet up with Lusamine, Wicke, Faba, who are also acting strange, and Professor Burnet. When they arrived at the Altar of Sunne on Poni Island, Ash and the rest of the Ultra Guardians are joined by Gladion, who also became an Ultra Guardian. Ash and the rest Ultra Guardians are explained that the Ultra Aura has been decreasing and because of it left a side-effect on all adults which makes them not their usually selfs. Informed that the side-effect doesn't effect children and Pokémon, Ash and the rest of the Ultra Guardians were inform of a small Ultra Wormhole but could't determined where it is due to the clouds being in the way. Ash, Gladion, Kiawe and Lana use their Z-Move to help get one of Faba's machine to work as it can remove the clouds. After clearing the clouds, Ash and the rest of the Ultra Guardians with Lusamine head over to a new ruins that the Aether Foundation found at the Ultra of the Sunne. However, Ash and everyone were called back by Wicke when she tells them that somethings is coming out of the Ultra Wormhole. Arriving back, Ash and everyone see Lunala coming out of it the Ultra Wormhole then saw unknown Pokémon coming out of it as well. Seeing Lunala in trouble, Ash and the rest of the Ultra Guardians head over to Melemele Island to help the Legendary Pokémon. Ash and the rest of the Ultra Guardians did the best they could to stop the unknown Pokémon from hurting Lunala but it ended getting absorb by it. When Team Rocket tried to catch Lunala while under the unknown Pokémon control, Ash was almost electrocuted by the net they used, after the possessed Lunala broke free from it, but Solgaleo, Nebby, came to his rescue. Ash became happy to see Solgaleo again as he tells it how much he missed it then witness it free Lunala from the unknown Pokémon control. After Lunala collapsed onto the beach and the unknown Pokémon collapse into the ocean, Ash with Gladion saved Lunala and Solgaelo, who went to check on its friend, from Team Rocket, who tried to catch both of them. When the unknown Pokémon came out of the ocean and possess Solgaelo, Ash tried to chased after it as he wanted to save his friend but the Ultra Wormhole closed before he could go after them. Seeing all the adults back to normal, Ash and everyone head back to base so Lunala could recover. While at base, Ash and everyone witness Lunala recovering then they all find out that the Aether Foundation decided to call the unknown Pokémon UB: Black. Ash became furious when he finds out that it was Team Rocket who tried to take the Cosmic duo. While watching over Lunala, Ash, Gladion, Kiawe and Lana witness their Z-Rings glow which restored the rest of Lunala strengths.
After Lunala recovered and seeing its determination to help Solgaelo, Ash and the rest of the Ultra Guardians dispatch as they followed Lunala through an Ultra Wormhole that the Legendary Pokémon created. Passing through the Ultra Wormhole and seeing more Poipole, Ash and the rest of Ultra Guardians realize that their in Poipole's home world. Ash and the rest of the Ultra Guardians helped care for Naganadel, Poipole evolve form. Through Naganadel telepathy, Ash and the rest of the Ultra Guardians were explain about Necrozma, UB: Black and the Blinding Ones real name, also about how their world became as it is now. Also, Ash and the rest of the Ultra Guardians were inform as to why Ash's Poipole came to their world. Ash and the rest of the Ultra Guardians watch Lunala fight a possessed Solgaelo. Wanting to help the Cosmic duo out, Ash, Gladion, Kiawe and Lana use their Z-Moves in hopes that Necrozma would releases Solgaelo. However, Ash, Gladion, Kiawe and Lana Z-Moves didn't work as they hopped it would because it made Necrozma stronger. After getting a call from Lusamine and explaining her the situation, Ash and the rest of the Ultra Guardians with everyone else in Alola share their Z-Power to Necrozma witch successfully set Solgaelo free from it. To help fully restore Necrozma to its true form, Ash, Gladion with the Island Kahuna's use their Z-Moves which gave Necrozma enough power to restore both its true form and Poipole's home word. After Poipole home world has been resorted, Ash had to say goodbye to his Poipole as it decided to stay where it belongs which he understands. Before leaving for home, Ash sees that Poipole made one final drawing of him and Pikachu as its way of showing how much it cares about them. Ash and the rest of the Ultra Guardians waved goodbye to their friend Poipole then returned to Alola. Later, Ash, Kiawe and Mimo all came across Pikachu Valley on Akala Island where a lot of PIkachu live also all of them are owned by Pikala, who loves Pikachu. Also, Ash and Professor Burnet attended an event at the Melemele Island's mall where the Masked Royal is starting is tour of going to every town to them how amazing Battle Royal battles are.
Ash with his classmates perform a play that was written by Rotom for their families and friends that came to see the performances. Later, Ash meets up with his friend Acerola again and introduce her to his friends. Ash, Kiawe, Lillie, Mallow, Sophocles and Acerola all helped Lana make a haunted house for Harper and Sarah, who wanted to go to one, at the Pokémon School. However, Ash and his friends witness real Ghost Pokémon come to them as they were attracted by Mimikins, Acerola Shiny Mimikyu, due to it being a real ghost. Ash and his friends were put to sleep where they saw several illusions created by a wild Mismagius. Thanks to Lana and Acerola, Ash and everyone were able to wake up from the illusions. When a magnetic force at Wela Volcano was causing the Aether Paradise equipment that detects Ultra Aura to get all messed up and could effect future Ultra Guardian missions, Ash and his fellow Ultra Guardians headed over to Akala Island to investigate the cause of the disturbances. Ash with Kiawe and Sophocles went to one side of the volcano while the girls went to the other to make the investigation go quicker. While investigating, Ash, Kiawe and Sophocles find out that some Alolan Geodude with its evolved forms are outside the volcano. Finding a spark stone, Ash and his group find out that some miners have been mining in the area. Through the information proved by three hikers, Ash and his group headed inside the mine to stop the miners from doing further damage to it. After stopping the miners and a rage an Alolan Golem, Ash and his group meet up with the girls where they informed Lusamine as to what caused the magnetic forces. Ash and rest of the Ultra Guardians were very grateful when the three hikers volunteer to help patrol the volcano to prevent from anyone disturbing the balance of the area. Ash was gonna go to Aether Paradise to deliver Professor Burnet and her Munchlax lunches when they forgot them. However, Ash was able to get to Aether Paradise when Lillie arrived in her helicopter where she explains that Lusamine needs to see him as she wants the detail about the Manalo Festival. After arriving at the Aether Foundation, Ash gives Professor Burnet and her Munchlax their lunches then headed over to see Lusamine where he witness Rotom download the photos it has from the events of the Manalo Festival. Ash and Lillie visited the Conservation Area to see the Ditto that they helped out before. Hearing that a Stufful that's being taken care by the Aether Foundation has gone missing, Ash and Lillie offer to help look for it. Finding Stufful with Team Rocket, Ash asked Team Rocket to give Stufful back but could't due to being attached onto Jessie's hair. Ash was about to have Pikachu Thunderbolt but Bewear showed up then witness Stufful hugging her as their mother and child. After Bewear and Stufful took Team Rocket away, Ash and everyone were still shocked about these turn of events, minus Wicke, who was happy about the reunion for Stufful and Bewear.
Later, Ash meets Hau, Hala's grandson, where he has a Dartrix, who happens to be Rowlet's evolve form, as his partner. Ash with Rowlet battles Hau and his Dartrix but lost when he could't put his Grass-Type Z-Crystal in his Z-Ring in time. Despite the lose, Ash asked Hau for a rematch which he accepted but the battle would have to take place that next day. After training Rowlet to learn a new move, Ash battle Hau again which he won when he performed Bloom Doom as his fishing move. Becoming Rivals and great friends, Ash and Hau part ways as they both vow to battle each other again one day. When Rotom got offer to be on its favorite T.V show, Ash was very happy for his friend but became worried and upset that Rotom didn't consider its friends when it accepted the offer to do the show oversea without giving a second thought. Ash started a fallout with Rotom then left all upset. After having a talk with Lillie, Ash decided to make things right with Rotom then went back to set to apologizes for his behavior before. However, Ash was surprised that Rotom decided to stay with him because it realized its dream was to become the world greatest Pokédex ever then grabs his friend playfully.
Wanting to get stronger for his last Grand Trail on Poni Island, Ash and Pikachu encounter Tapu Koko again where they battle it once again. However, Ash with Pikachu were accidentally sent to a parallel world when Tapu Koko and a Shiny Tapu Koko from the parallel world used an electric attack at the same time which created a crack between the two worlds. During their visit, Ash with Pikachu encounter Dia and his partner Zeraora, a Mythical Pokémon, when they came across Guzzlord, who happens to be an Ultra Beast. Ash and Pikachu listen to Dia's story when he told them how Guzzlord came to his world also how it destroy his world. After arriving at Dia's base, Ash and Pikachu were in shock that his base is the Pokémon School. Ash was explain by Dia, who realize that their not from his world, that he and Pikachu got sent to a parallel world. Despite being told no into helping them stop Guzzlord, Ash and Pikachu decide to train anyway which inspired Dia with Zeraora to join them so they can battle the Ultra Beast. When Guzzlord was approaching them, Ash with Pikachu join Dia and Zeraora to sent the Ultra Beast back through the Ultra Wormhole for good. When Dia wanted to retreat because Guzzlord was too strong, Ash refuse to run and was determined to help his friend finish what he started. With the help from the Shiny Tapu Koko, Ash and Dia use Gigavolt Havoc together to finish Guzzlord for good which sent it back through the Ultra Wormhole. With Dia and the two Tapu Koko's help, Ash and Pikachu were sent back to their world.
Through an surprise arrangement by Lana, Ash reunites with Misty and Brock again. After Brock offer to stay and help Nurse Joy at the Pokémon center, Ash and his classmates show Misty their favorite spots. While the girls were showing Misty their favorite jewelry store, Ash, Kiawe and Sophocles waited outside for them where they spotted the Poké Ride Mantine Surf. Hearing that Misty, Lana and Mallow were interested in Mantine Surfing with Sophocles adding about doing it, Ash suggested into going to Treasure Island as their destination to surf to. Ash and his friends all had a great time surfing as everyone jumped on the waves, minus Lillie, Mallow and Sophocles. After arriving on the island, Ash show his friends around the island. However, Ash and his friends had to stop Team Rocket from stealing the Mantine when they showed up once again to cause trouble. After freeing the Mantine, Ash, Kiawe and Lana use their Z-Moves with Misty boasting their moves by having her Mega Gyarados use Hydro Pump to blast Team Rocket off. Ash and Misty meet back up with Brock where he had dinner made for all of them. Ash with his classmates take Misty and Brock to Akala Island to see Kaiwe's family farm. After showing the family farm, Ash with his classmates introduce Misty and Brock to Olivia. Watching a battle between Olivia and Brock, Ash with his friends, minus Olivia and Brock, were captured by Team Rocket when they arrived to capture their Pokémon. Thanks to Olivia and Brock teamwork, Ash and his friends were set free from Team Rocket. After Team Rocket was defeated, Ash and his friends watch a firework display then had to say goodbye to his longtime friends once again but they both vow to come back and visit again one day. Later, Ash and his classmates arrive on Poni Island to do their research projects for school. Ash was planing to do his last Grand Trail battle as his project but could't because there was no Island Kahuna. Despite having no Island Kahuna, Ash decided to battle Tapu Fini for his Grand Trail battle instead. While exploring the Island, Ash and his classmates meet Hapu, who is the granddaughter of one of the previous Island Kahuna of Poni Island, where she mistaken them for thieves as she believes that they were gonna take her radishes from her fields. After losing Hapu, Ash went looking for Tapu Fini where they encounter Team Skull stealing the Sensu Style Oricorio by using Hapu's radishes to lure the Dancing Pokémon to them. Ash was getting ready to battle them but Hapu showed up where she accused him for stealing again but he cleared the misunderstanding to her by showing her what Team Skull was doing. After Hapu took care of Team Skull and apologizes for accusing him as a thief, Ash asked if he can have another battle with her but she refuse to battle him then left. Wanting to battle Hapu again, Ash and Pikachu went to the Ruins of Hope to find her. After helping her Mudsdale calm down when it stepped on a Corsola brach, Ash asked Hapu, who wanted to repay him for helping her, for another battle but she refused to battle him. Ash kept asking Hapu for a battle but he ended getting kicked by her Mudsdale when he annoyed her. Landing where Lillie and Gladion were, Ash was chased by Hapu until his friend got her to stop. Ash was asked by Gladion, who was gonna battle his sister, if he wanted to battle him which he accepted. However, Ash lost to Gladion again then saw Tapu Fini fly over them. Ash with Hapu and Kiawe join Sophocles to Vast Poni Canyon where he can evolve his Charjabug into Vikavolt. Arriving at the canyon, Ash along with his friends meet up with Horacio and his brother, who he once competed against in the Charjabug race with Kiawe and Sophocles. Ash, Hapu and Kiawe waited outside when Sophocles challenge Horacio to a contest when he expressed interest in evolving his Charjabug. Worry for their friend, Ash and Kiawe were gonna look for Sophocles but he came out with his newly evolved Pokémon. Later, Ash joins his friends for a party to celebrate Ida, who once helped Lana master her Z-Move, and Kanoa journey to see the world. Ash and his friends witness Lana show the hard work she did with her Popplio which resulted in her partner evolving into Brionne. Ash and everyone waved goodbye to Ida and Kanoa.
Wanting to challenge Tapu Fini, Ash heads over to the Ruins of Hope with Kiawe, who also wants to battle the Island Guardian. However, Ash and Kiawe got Tapu Fini mad when they had a double battle to see who would battle the Island Guardian first. Ash, his Pokémon and Kiawe's partners were trapped in a force filed that Tapu Fini created. When Tapu Fini offer them a chance to leave when Kiawe went to get some of Tapu Lele scales for their freedom, Ash and everyone choose to stay for their friend. After Kiawe arrived back, Ash and everyone were free to go then witness Kiawe get a Flyinium Z from Tapu Fini. Ash and his friends headed over to Hapu place where they helped in her radishes fields. However, Ash with Pikachu, Rotom and Torracat got lost in a fog that was created by Tapu Fini. During their time inside the fog, Ash was very happy that Torracat got to see Stoutland again. Ash was very pleased that Stoutland help Torracat learn Fire Blast but they had to say goodbye to it when the fog cleared up. Reunited with their friends, Ash with his friends were introduce to Shaymin that Mallow found and decided to take care of it. Hearing that Hapu has official become the new Island Kahuna of Poni Island, Ash asked for Grand Trail but she told him that she needed to complete a ritual to official be the Island Kahuna but she does accept his challenge. After witnessing Hapu's ritual to become the Island Kahuna of Poni Island, Ash hangs at the beach with his friends before his Grand Trail battle. When the Grand Trail battle came, Ash choose Pikachu as his Pokémon to battle Hapu in a one on one battle. Despite the type disadvantage Pikachu had, Ash was able to come up with an idea to beat Hapu which was to get her Mudsdale wet then used Gigavolt Havoc to finish it off. Ash was excited that he won his last Grand Trail then Hapu presents him a box filled with Z-Crystals where he will choose his prize. Wanting to thank his best friend for all his hard work, Ash lets Pikachu decide which Z-Crystal they should have where he chooses Steelium Z as their reward for wining the Grand Trail of Poni Island. With their research projects done, Ash and his friends say goodbye to Hapu before they head back with Professor Kukui to Melemele Island. After returning to Melemele Island, Ash and his friends were introduce to PokéGolf through a well known player named Kahili. Also, Ash and his friends came across a new Pokémon species when they wonder to the Pokémon school. Ash and his friends observed them until they ran away from the classroom which motivated them to look for them. Finding them at top of the Pokémon school bell, Ash and his friends went up there to see them but they ran away from them again. After returning to Professor Kukui's house, Ash contacted Professor Oak about the new specie he encounter. However, Ash dose't realize that one of the new Pokémon species stowed away inside his backpack as it befriended his Rowlet while they were looking for the others around campus. When Professor Oak contacted him again, Ash was inform that the new species name is Meltan then has high hope of seeing it again. At school, Ash told his friends about the Pokémon they saw the other day then they headed outside to do some Pokémon battling. Ash battled Kiawe in a triple battle but was called off then was asked on what he was gonna do next as he was finished with the Island challenge, due to passing all the Grand Trails. However, Ash could't give an answer when he sees Rowlet flying pass them then he and Pikachu go after him. Ash and Pikachu were able to meet up with Rowlet then both of them became surprise to see their friend all scruffy up. Also, Ash was excited to see that a Meltan, who thought he and Pikachu were gonna hurt them as they were dealing with Team Rocket before they arrived, came from behind Rowlet and wonders if it got separated from its friends. Ash, Pikachu and Rowlet brought Meltan back to the Pokémon school to show their friends. While wondering on how to find Meltan friends, Ash and his friends were surprised that Lusamine's Clefable brought the other Meltan with her as they been in the Ultra Guardians based. Ash and his friends were witness when Clefable showed them on how she got them to behave. After Meltan reunites with its friends, Ash, who sees its unbreakable friendship with his Pokémon, approaches Meltan, who has taken an interest in him, as he asks it if it wants to be with Rowlet then it excitedly told him yes and asked him if it can join them which he happily accepted then got ready to catch it. However, Ash accidentally hit Meltan hex nut on the first try but caught it on the second try thus having a new Pokémon and friend on his team. Later, Ash, Kiawe, Lana, Lillie and Mallow supported Sophocles when he was a contested on a game show. Also, Ash with Kiawe and Sophocles helped do the behind the scenes of a T.V show that the girls were gonna be doing as they watch it at Professor Kukui's house. Sometime later, Ash and his fellow Ultra Guardians were called in during the night when a new Ultra Beast, named Pheromosa, arrived as it took Hala Z-Crystal. Ash and his fellow Ultra Guardians went looking for it again when they heard that it took more Z-Crystal from other Trainers but it was too fast for them. Forming a plan, Ash and his fellow Ultra Guardians plan to use their Z-Crystal to lure it out in hopes of catching it. However, Ash and his fellow Ultra Guardians were shocked that their planed failed. Ash was a witness when Bewear, who was furious for the way it stole Z-Crystal and that it broke Team Rocket's Mewoth heart, battled it and defeated it which gave the Ultra Guardians a chance to catch it. After returning Pheromosa home, Ash and his fellow Ultra Guardians return the Z-Crystal to their rightful Trainers.
Ash and his classmates headed over to Aether Paradise as Professor Kukui was gonna make an announcement there. Hearing that Alola first ever Pokémon League as the Aether Foundation and the Island Kahunas are sponsoring it, Ash, Kiawe, Lana and Sophocles all plan to enter due to being a League where everyone can participate while Lillie and Mallow were gonna consider entering. While at school, Ash and his friends hear that Team Skull grunts, Tupp, Rapp and Zipp, were outside. Despite Professor Kukui telling everyone to stay in the classroom, Ash and his friends head down anyway to confront them. During the contortion, Ash and his friends encounter Plumeria, who he meet during his time on Poni Island, and the boss of Team Skull Guzma, who has history with Professor Kukui. Not liking how he is treating Professor Kukui, Ash challenges him to battle which he accepted. However, Ash battle with Guzma ended up being called off when his Pokémon Emergency Exit ability activated. Ash and everyone were witness when Team Skull left the Pokémon school. Sometime later, Ash, Kiawe, Lana, Mallow and Sophocles admire Lillie's new found Z-Ring that belongs to her missing father, Mohn. Ash and everyone accompany Lillie to go see Hala as she needed to get permission to use his Z-Ring until he is found. Also, Ash and his friends watch Lillie try to use the Ice-Type Z-Move, Subzero Slammer, but fail. Despite not being able to do a Z-Move, Ash and everyone assured her that she did her best as they encourage her to keeps on trying until she'll be able to perform a Z-Move one day. Ash and his classmate return to Ula'ula Island for a two day trip to Mallie City. When they got their, Ash and his friends went to Mallie garden for some sight seeing. During their visit, Ash and friends visit the Kantonian Gym where he battle Ryuki the Gym Leader there. Ash's battle with was a one on one battle but was changed into a double battle when Meltan interfered due to being up upset about how Rowlet was losing to him. Thanks to Rowlet learning Brave Bird and a compaction with that same move along with Meltan Flash Cannon, Ash was able to beat Ryuki and got a souvenir badge from him. After visiting the Kantonian Gym, Ash and his friends head back to Melemele Island. Later, Ash, Kiawe, Lana, Lillie and Mallow accompany Sophocles to Poni Island as they came with him to cheer him on as was participating in a Vikavolt Race there. After witnessing Sophocles win the race, Ash, Kiawe, Lana, Lillie and Mallow were excited that their friend got a Buginium Z which was the prize for winning the race then they all witness him getting a Z-Ring from Hapu, after she heard from the other racers what he did to stop Team Rocket from stealing the Vikavolt. While fishing one day with their friends, Ash, Pikachu, Lana and Sandy were in Brionne's balloons where they raced. However, Ash and Lana with their Pokémon got separated from their friends when they were caught in a whirlpool created by the Legendary Pokémon Kyogre. Landing in rocky expose reef, Ash and Lana encounter Kyogre then notice that it had been poisoned. While trying to help Kyogre, Ash and Lana came across Pokémon hunters as they were the ones who poisoned Kyogre. Ash called out his Pokémon to fend off the hunters and Lana's Pokémon helped out as well while Lana try to get Kyorge to fed the antidote to cure its poisons. After fending off the hunters and Kyogre had been cured, Ash called his Pokémon back then he, Pikachu and Sandy were sent flying but Brionne saved them by making balloons for them then went after Lana as she was dragged underwater by Kyogre. Ash, Pikachu and Sandy waited for the two to come up but to their surprise Brionne ended up evolving into Primarina through her determination to help her Trainer. Also, Ash with everyone witness Lana and Primarina calm Kyorgre down. After saying farewell to Kyogre, Ash and Lana meet back up with their friends then told them about their adventure.
Arriving to return a frying pan he borrowed to Mallow, Ash noticed that Olivia was helping at Mallow's Family restaurant then was inform that his friend was off doing an errand. After Rotom pointed out that Olivia might have a hard time helping due to being clumsy, Ash decided to help out in the Family restaurant as well. While helping, Ash notice that Kiawe arrived with a MooMoo Milk delivery as he told him that his timing was perfect and his friend join the helping when he notice Olivia was also helping out as well. After Kiawe told the arriving Lana, Lillie and Sophocles that they needed help, Ash and everyone helped keep the restaurant running until Mallow return. However, Ash and his friends were exhausted from all the customers that came as they told a returning Mallow that they had a ton of people come to the restaurant while she was away. After Mallow's father, who was grateful for their assistants, told their friend that the restaurant got taken care thanks to them, Ash, Olivia, Kiawe, Lana, Lillie and Sophocles were inform that their friend helped out in the Forest Cafe a lot then got a Grassium Z and a Z-Ring for helping. Ash, Kiawe, Lana, Lillie, Mallow and Sophocles all became excited because now all of them have a Z-Ring. Ash, Kiawe and Lana train their Z-Moves for the Alola League while the rest of their friends practice their Z-Poses. Also, Ash accompany Kiawe and Sophocles to a Z-Move training boot camp. Ash and Kiawe both help Sophocles perfect his Z-Moves. When Kiawe came up with a way to help Sophocles, Ash stood out of the way during the whole ordeal but was pleased to see that his friend perfected his Z-Moves. While at school, Ash and his classmates were trying to cut makiwara by using Pokémon moves. However, Ash and his friends were called in for an Ultra Guardians mission. After entering the base, Ash and his fellow Ultra Guardians were shocked that the Meltan living with Clefable have multiplied. Ash and his fellow Ultra Guardians were inform about the new Ultra Beast, Kartana, then they embark on their mission to find it. When they did find it and was about to cut the Pokémon School, Ash stop the Ultra Beast from doing it and convinced that not everyone wants things cut. After trying to catch it and witness how it defeated Team Rocket so easily, Ash and his fellow Ultra Guardians were told to canceled the mission due to a meteor getting to hit Alola. Hearing that the meteor was gonna hit the Pokémon School and despite being told to evacuate, Ash and his fellow Ultra Guardians refuse to run away as they decided to stop the meteor. Using their ride Pokémon to get to the meteor, Ash and his fellow Ultra Guardians have their Pokémon cool it down then had some of them cut it. When their plan didn't work, Ash and his fellow Ultra Guardians were running out of ideas but the Ultra Beast arrive to cut the meteor which saved Alola. Ash and his fellow Ultra Guardians were scolded by Professor Burnet for putting themselves endanger like that but was happy that it worked out and they were all alright. Seeing that Ultra Beast was getting to leave, Ash and his fellow Ultra Guardians bid it farewell.
While training, Ash and Torracat were accidentally sent into the past by a nearby Celebi. Ash and Torracat ran into a Litten with a little boy, who happens to be Professor Kukui when he was a kid. Wishing to see Inferno Overdrive, Ash was lent the Firium Z by the latter then perform the Fire-Type Z-Move for the first time with Torracat. When ask to battle him, Ash wanted to go easy on the boy but was told that he wanted a full on battle which he gave him. Ash gave the young boy some helpful advice and assuring that if he kept trying he'll win the next time. Ash and Torracat were introduce to the young boy's Pokémon friends. Also, they were introduce to the Totem Pokémon, nicknamed Elder. When a rainstorm hit and their Pokémon were asleep, Ash told the young boy about the Gym battles and the Pokémon Leagues he entered in during his travels, but didn't realized that he just gave Professor Kukui his ambitions and the Alola League in the future. After the rain stop and the Totem Pokémon was having trouble, Ash and the young boy realize that some Cutiefly were stuck in its branches. After helping the Cutiefly, Ash was given a Firium Z of his very own from the Totem Pokémon as thanks for his help. When he was gonna have another battle with the young boy, Ash and Torracat were sent back to the present by the same Celebi, which left both of them unaware of their real identities due to both of them being call a different name, Move Kahuna and Roarie. Upon arriving back to the present, Ash notice the Totem Pokémon in the shape of the tree then looks at his newly obtained Firium Z. Ash and Torracat were reunited with their friends, who been looking for them. While walking back to Professor Kukui's house, Ash asked Pikachu, Rowlet, Lycanroc and Meltan what happened while he and Torracat were away but he didn't get an answer from them he just got some affection from them instead. Upon arriving at the house, Ash went to wash his hands then went to get Professor Kukui as it was lunch time. Ash, Kiawe, Lana, Mallow and Sophocles headed over to Lillie's house for Z-Move training. While there, Ash, Kiawe, Lana, Mallow and Sophocles were introduce to Magearna by Lillie as she explains to them that it was a gift from her father, Mohn. While training, Ash gave some advice to Lillie when she was having trouble on how to feel when using a Z-Move. However, Ash and everyone were called in by Hobbes as Professor Kukui was official announcing about the completion of the Alola Pokémon League stadium. Ash, Kiawe and Lana became fired up when they hear that the winner of the League will have a special match against the Masked Royal. While continuing the training, Ash witness his best friend perfecting her Z-Move and was excited that Lillie did it and was also happy that he was able to help her.
Arriving at Manalo Stadium, Ash and his friends get ready to participate in the League. While checking out the stadium, Ash meets up with Hau and was introduce to his newly evolved Decidueye. Hearing Team Skull's plans to destroy the League and being explain about Professor Kukui's past with Guzma, Ash and his friends all plan to stop Team Skull from destroying the League, after hearing their participating in League as well. During the opening fest for the League, Ash and his friends meet up with Gladion again. Ash and his friends were explained that the preliminary round will be a Battle Royal by the Masked Royal. After getting through the preliminary round, Ash was one of sixteenth Trainer's to make through the eighth finals where he'll be battling Faba.
Ash was originally gonna use Pikachu against Faba but he had his Hypno use Psychic to bring out Meltan instead. Through the use of Meltan's ability to eat metal and its Flash Cannon attack, Ash was able to defeat Faba and move on to the Quarter-Finals. After his battle, Ash watch all the other matches. Ash kept watching the rest of matches until they revealed the line up for the Quarter-finals where he'll be battling against Hau. Ash used his Rowlet, against Hau's Decidueye, which was clearly a disadvantage for him. Both Pokemon, at one stage, were down during the battle, and since Rowlet did not budge an inch after Hau's Decidueye got up, Nanu announced Hau as the winner, only to have it overturned by Hala, as Rowlet had fallen asleep. Ash used this second chance to finally defeat Hau using Rowlet's Brave Bird, thus winning the battle. After the battle, both rivals applauded each other and promised to battle again. Ash watched all the rest of the matches for the quarter-finals. After the semifinal matches were revealed, Ash was surprised when he saw he has to face Guzma in the semifinals.
Before his match in the Semi-finals, Ash watch the other Semi-final battle of Kiawe and Gladion. After his friends battle concluded and Gladion as the victor, Ash battle Guzma in second battle of the semi-finals. Ash was able to defeat one of Guzma's Bug-type Pokémon with Torracat's help due to having the advantage over that type. However, Ash was bummed that Torracat got knocked out but praised for hard fought battle then send out Pikachu to battle Guzma. Although their Z-Move did some damage to it, Ash and Pikachu had to finish to battle with all they got which they did. After defeating Guzma, Ash gets ready for the finals against Gladion.
Before the finals, Ash greets his mother, Delia, and Professor Oak as they came to watch him in the finals. Also, Ash, his mother, Professor Oak, Kukui and Burnet witness all the other Meltan arrived when his gives the other its location. Ash and everyone witness them all merged which led Meltan to evolve into Melmetal. Starting the finals, Ash brought out Melmetal and it gave its all but was knocked down by Gladion's Silvally. Ash had Pikachu battle it and defeated it but he had to go up against Zoroark, who happens to be his and Lillie's father, Mohn, Pokémon. After a clash with Z-Moves, Ash and Gladion were shocked that their Pokémon knocked each other out. Using their Lycanroc, Ash and Gladion gave everything they had. However, Ash was able to beat Gladion and become the first Champion of Alola. After getting his League Trophy, Ash and his friends noticed that an Ultra Wormhole has opened which a familiar Ultra Beast, Guzzlord, appeared.
After telling everyone about the Ultra Beast week spot, Ash helps get everyone to safety. At the pier with the Masked Royal, Ash notice another Ultra Wormhole which another Ultra Beast, Guzzlord, appeared. Ash and the Masked Royal fight off long enough to get it close to the Ultra Wormhole but his friend Pokémon was knocked out before they could finish. However, Ash notice another Ultra Wormhole open up which an another Ultra Beast, Naganadel, popped out of. Ash didn't recognized it at first but when Pikachu showed the Ultra Guardian pendent is when he realized that its his old friend Poipole but it evolved into Naganadel. Seeing that Naganadel knows Thunderbolt and that the Masked Royal has an Electrium Z, Ash and his friend used Gigiavolt Havoc to send the Ultra Beast back through the Ultra Wormhole. However, Ash and Rotom became shocked when they see that the Masked Royal is Professor Kukui, after his mask was sent flying due to strong force of the Z-Moves, with Naganadel along with Pikachu being witnesses as well.
Although he was in shocked that the Masked Royal was Professor Kukui, Ash shook those feelings off as he became more excited for the exhibition battle as he not only gets the chance to battle his teacher and role model but he also doesn't care that he kept his double life a secret from him along with their friends for so long. Ash and Professor Kukui both agreed to a full battle then he recalled Naganadel. Before the full battle, Ash trains with Melmetal in preparation for his battle with Kukui. During their full battle, Ash had Torracat battle Professor Kukui's Incineroar but recalled him to recover then sent out Lycanroc to battle it but he recalled it and sent out his Braviary. Ash was pleased that Lycanroc dealt some damage to Professor Kukui's Braviary but he ended up losing to it but Rowlet was able to defeat it in an aerial battle. However, Ash was bump when Rowlet was knocked by Professor Kukui's Venusaur but sent Torracat back out to defeat it then recalled him. Ash had Pikachu battle Professor Kukui's Empoleon but had him come back when he took some serious damage but Melmetal defeat it but ended up being knocked out when he sent his Incineroar back out but he recalled it. After Professor Kukui sent out his Lucario, Ash sent out Naganadel to battle it. Little did he know, Ash was being watch by Tapu Koko, who help the Island Kahunas defeat Guzzlord then decided to stay after the Ultra Beast was defeated, as it was watching the battle between him and Professor Kukui.
Ash was pleased to see when Naganadel defeated Professor Kukui's Lucario as he recalls it after their battle. When Professor Kukui resent out his Incineroar, Ash resent out Torracat to battle his rival. After they both used Inferno Overdrive at the same time and had a clash with one of their moves, Ash was happy that Torracat defeated Professor Kukui's Incineroar but he ended up evolving into a Incineroar but he could't continue battling due to the battle taking a lot out of him. When Professor Kukui was gonna sent out his last Pokémon, Ash was surprised that Tapu Koko came down to the battlefield and when it smack Professor Kukui's Poké Ball out of his hand. Seeing that Tapu Koko wants to battle him again as Professor Kukui last Pokémon instead, Ash became eager that he'll be battling it but resent out Naganadel to battle the Island Guardian when Pikachu wanted to be its opponent first. When Naganadel was defeated by Tapu Koko, Ash praised it for its efforts then recalled it and got ready to send Pikachu back out to battle the Island Guardian. After the rest of the Island Guardian's arrive and Tapu Koko gave Professor Kukui a Tapunium Z, Ash notice his Electrium Z was transforming into Pikashunium Z once again as his opponent was preparing a Z-Move. Ash preform his own Z-Move with Pikachu as both Guardian of Alola and Ten-Million Volt Thunderbolt collided. However, Ash help Pikachu by giving him his strength and encouragement which led them to defeat Tapu Koko. After the battle, Ash was praised and coagulated by Professor Kukui for the hard fought battle they had.
With the Pokémon League done, Ash, the professors and his Pokémon were having a breakfast at Professor Kukui's house. However, Ash had to say goodbye to Naganadel, who sensed a Ultra Wormhole nearby, as it had to return to its home then bid it farewell. At school, Ash listens to his friends dreams and plans for an upcoming vacation then was ask to battle by Kiawe in order to make up for not getting the chance to during the League. Hearing Sophocles ask him about his plans for vacation, Ash became unsure, due to not giving that much of a thought on the matter. After school was done, Ash became lost in his thought as he not only doesn't know what to do next, due to finishing his Island Challenge, but also felt something missing from himself. Unsure, Ash asks Professor Kukui for some advice but all he told him that he should figure it out himself. After sampling some Mallow's new recipes, Ash battled Kiawe at Akala Island and won. When Olivia, who was referring the battle, ask them about their plans, Ash was still unsure as he explains to her that he should figure it out for himself and then listens to what Kiawe plans are. When Olivia realizes his friend true goal, Ash became happy for Kiawe and supports him in making his dream a reality. Although, Ash listens to Olivia give Kiawe some advice about going out and seeing the world as it would help him make his dream come true. Ash was told by Olivia that he would understand what she was saying as he came to Alola for his journey to make his dream come true. That night, after thinking about what Olivia said, Ash not only realizes what he was missing from himself, which was traveling the world in order to fulfill his dream, but also decided to continue his journey. However, before setting off for his new journey, Ash told Pikachu that their first stop was to go visit Pallet Town to see his mom and their Pokémon family that reside at Professor Oak's lab. Also, Ash told Pikachu that there were more places and Pokémon to see.
However, that next day, Ash was gonna tell his friends of his decision of resuming his journey but couldn't do it, after hearing that Lillie was leaving Alola as well with her family to find her long lost father. While staring at the sunset, Ash told Rotom that he's gonna tell their friends that next day. After battling and helping Team Rocket's Mimikyu, Ash reunites with Nebby, who decided to come see him and say goodbye. Riding on Nebby that next day, Ash meets up with his friends and told them of an adventure they had together. After telling his friends about Rotom working for the Aether Foundation, Ash told everyone about his decision of going home to Pallet Town. Also, Ash told his friends about how happy he was that he came to Alola and attended the Pokémon school but now knows that it was time for him to keep continuing his journey so he can fulfill his ambitions, which they gave their full support for him. When Lillie and her family were getting ready to leave Alola to find Mohn, Ash was given thanks by his best friend for everything he did for her and bid her farewell. Arriving at the airport, Ash and Pikachu said goodbye to the Professors then got on the plane to head back to Kanto. While on the plane, Ash and Pikachu were given one final farewell from their friends then continued the voyage back to their hometown.
With Professor Oak
With Professor Kukui
Mr. Mime ♂
Alola Island Challenges
- Verdant Cavern Trial (Normalium Z)
- Melemele Island Grand Trial (Electrium Z/Pikashunium Z)
- Brooklet Hill Trial (assisted Lana; did not receive Z-Crystal)
- Lush Jungle Trial (Grassium Z)
- Akala Island Grand Trial (Rockium Z)
- Thrifty Megamart Trial (did not receive Z-Crystal)
- Ula'ula Island Grand Trial (Lycanium Z)
- Poni Island Grand Trial (Steelium Z)
- Celebi's time-traveling Trial (Firium Z)
Pokémon League status
- Pokémon Pancake Race: Runner-up
- Charjabug Race: Winner with Sophocles and Kiawe
- Pokémon Sled Jump Games: Unknown
- Kantonian Gym: Winner
- Manalo Conference (exhibition match) defeats Professor Kukui: Winner
- This is the first time Ash:
- Used a battle technique.
- Traveled with more than two or three companions.
- Attended school during the most of his journey.
- Stayed with a regional Professor during the most of his journey.
- Had a traveling companion as a main rival.
- Had a Rotom inhabit his Pokédex.
- Didn't have a Pokédex in his pocket.
- Had a main rival that is related to one of his traveling companions.
- Returned to his hometown in the middle of his journey.
- Used a unique move, although in this case a Z-Move.
- Was part of a task force for an organization.
- Temporally separated from his companions during his journey.
- Had traveling companions compete in a Pokémon League competition.
- Helped stop a villainous organization plans during a Pokémon League competition.
- Achieved the title of Champion in a Pokémon Regional League, although this is the second time he achieved as the first was the Orange League.
- Ash's Alola team are very first team to:
- Have a Steel-Type on a team.
- Have a fully evolved Rock-Type, Poison-Type and Steel-Type.
- Have an Ultra Beast and a Mythical Pokémon on a team.
- Have a member or more that is Genderless.
- Have a walking member or more other then their Trainer's Starter Pokémon.
- Have members use Z-Moves other then their Trainer's Starter Pokémon.
- Have a member know an exclusive Z-Move other then their Trainer's Starter Pokémon.
- Have a member with an Everstone.
- Have a member or more participated in either one or both of the Island Challenges Trail and Grand Trail battle other then their Trainer's Starter Pokémon.
- Have a member or more not participated in both the Island Challenges Trail and Grand Trail battle.
- Have a member or more know Electric-Type moves other then their Trainer's Starter Pokémon.
- Have gotten their Trainer the title of League Champion in a regional League alongside their Trainer's Starter Pokémon.
- Have a member evolve off-screen.
- Have a member faint after evolving.
- Have a member or more not use a Z-Move.
- Ash's Alola team shares a few similarities with both his Hoenn team and his Kalos team:
- They have five members on their teams.
- They single handily compete in their regional Leagues.
- They have a member or more that revealed their ability, although that is also shared with his Sinnoh team and his Unova team.
- They had all their members participated in a full battle, although that is also shared with the Orange Island Pokémon and his Sinnoh team.
- They had a member or more that battled a Legendary or Mythical Pokémon, although that is also shared with his Kanto team, Johto team, Sinnoh team and Unova team.
- Like just his Hoenn team, Ash's Alola team has a member or more that was given or had an accessories, although that is also shared with his Kanto team and his Unova team.
- Ash's Alola team shares many similarities with just his Kalos team:
- They both have a member with a unique power or form.
- They both have a member or more that temporally or a while disobey their Trainer, although that is also shared with his Kanto team.
- They both have a member or more that was released, although that is also shared with his Kanto team and the Pokémon from the Orange Island.
- They both had a member or more not participated in a Gym battle, although that is also shared with his Kanto team, Johto team and Sinnoh team.
- They both gotten their Trainer to the Finals in their regional Leagues.
- They both have a release member that, temporally, rejoins the team.
- They both had four members that evolved, although that is also shared with his Kanto team and his Sinnoh team.
- They both had none of their members defeated a Legendary or Mythical Pokémon, although that is also shared with his Johto team, Sinnoh team and Unova team.
- Ash's Alola team shares a couple similarities with his Sinnoh Team:
- Like his Unova team, Ash's Alola team were kept in a storage by a different regional Professor other then his home region Professor during or after their Trainer's journey, although the difference between them is that one team was sent to their Trainer's home region Professor while the other team stay with the Professor in their home region.
- Like his Johto team, Ash's Alola team has a member that was caught in a different Poké Ball.
- Like his Kanto team, Ash's Alola team has a member or more capable of Gigantamax, although that is also shared with their Trainer's Pokémon from the Orange Island.