"Yo! Finally got here, huh? I wasn't in the mood at Cinnabar, but now I'm ready to battle you. ... You're telling me you conquered all the Gyms in Johto? Heh! Johto's Gyms must be pretty pathetic then. Hey, don't worry about it. I'll know if you are good or not by battling you right now. Ready, Johto Champ?"
— Blue in Gold, Silver and Crystal.

Blue Oak is the player's rival in the Generation I games and their first set of remakes, and is a Pokémon Champion. During the Generation II games, Blue serves as the Gym Leader of Viridian City's Gym in the absence of Giovanni.

Blue is unique as a Gym Leader, because he has no set type for his Gym, and instead uses a variety of Pokémon. He gives the Earth Badge to trainers who are able to defeat him.


Red, Blue, Green and Yellow \ Let’s Go Pikachu and Eevee \ Gold, Silver and Crystal

Blue is a tall, thin young man with light skin, brown eyes, and tall, red spiky hair. In Red, Blue, and Yellow (Generation I), he wears a long purple shirt, dark gray pants, a yin and yang necklace, and brown boots with black straps encircling them.

FireRed and LeafGreen

In FireRed and LeafGreen (Generation III), his appearance changes slightly; the colours of his shirt and pants are switched, so he wears a short-sleeved dark gray shirt and purple cargo pants and black shoes. He also carries a light blue pack around his waist, and has purple bands around his wrists.

HeartGold and SoulSilver

In HeartGold and SoulSilver (Generation IV), Blue appears older than he was in previous Generations. He is slightly taller and more mature-looking. He wears a black leather jacket, a black belt around his waist, khaki cargo pants, and black shoes.

Sun and Moon

In Sun and Moon, Blue wears a new outfit, which consists of a black short-sleeved shirt with buttons, green pants and shoes. He also wears a pair of sunglasses and carries a gray backpack.

It is noted that Gary Oak (from the anime) strongly resembles Blue due to being directly based on him


In the Generation I games, Blue is a self-absorbed, rude, snarky and overly competitive rival to the player. He will often insult the player, and is not a good sport when the player defeats him in a battle. With each defeat, he insists that the player was lesser and weaker than he was, denies the fact that he is not as skilled, and bids farewell in a disrespectful manner, often saying "Smell ya later!" as he walks away.

However, in HeartGold and SoulSilver (Generation IV), Blue is a more mature and much kinder person, and is shown to gracefully accept defeat when the player challenges and beats him at the Viridian Gym. He is also shown to be passionate and respectful in Generation V, and likes to battle a challenger, no matter who they are.



As previously noted, Blue serves as the player's Rival in the Generation I and Generation III remake games. In Gold, Silver, Crystal, HeartGold and SoulSilver (Generations II and IV), Blue has a less involved role, as the Viridian City Gym Leader.

Red, Green, Blue and Yellow

In Red, Blue & Green, the player first meets him in Professor Oak's Lab, where he gives both a starter Pokémon.


The original artwork for Blue.

Despite the player first meeting Blue at the games start, the characters have evidently known each other for a long time, as stated by Professor Oak. As with every game, whichever Pokémon the player chooses, the rival (Blue) will choose the type that is effective against it (Except in Generation VII)(e.g. player chooses Bulbasaur (Grass), rival will then choose Charmander (Fire).

Later, after receiving the Pokédex, Blue will set out to find every Pokémon and be one step ahead of the player. As the player progresses through the game, he/she will encounter their rival in several locations and have to battle them every time.

Toward the end, after receiving all eight Gym Badges and defeating all of the Elite Four, it is revealed that Blue has already defeated the Elite Four and has become the Pokémon Champion. Challenging him, the player will battle Blue for the title, and when defeated, Professor Oak will come in and induct the player into the Hall of Fame.

Blue's appearance in the original games changes twice from the original appearance, throughout the game. The second appearance is similar to the first, with the addition of a backpack and a Poké Ball. The third (champion appearance), looks almost completely different, with an all new attire, and different hair.

In Yellow he is similar to that of the Red and Blue version. In this game however, his appearance is more similar to Gary's appearance from the anime series. Also, instead of choosing the opposite Pokémon, Blue chooses Eevee as it is the only one, while the player must take Pikachu. The first two battles with Blue are the deciding factor for what his Eevee will evolve into. It is decided on whether the player wins or loses the battles in Professor Oak's lab and on Route 22, or simply skips the latter area.

In these games, Blue's appearance also alters twice after a while, though not as dramatic as the champion appearance in the Red and Blue games. The battle sprite simply are in new poses each time. He is still the Champion until you defeat him.

Gold, Silver and Crystal

In Gold, Silver & Crystal, he is far less involved when compare to the previous. After the disappearance of Giovanni, the former Head of Team Rocket and Viridian Gym Leader, Blue takes over the Gym. Unfortunately for trainers, he is never usually at the Gym, making it hard to battle there. Unlike any other known Gym Leaders, Blue uses a variety of types in his Pokémon team.

FireRed and LeafGreen

Blue (FRLG)

In FireRed and LeafGreen, he has exactly the same as in Red and Blue. The only slight difference however is that his appearance does not change throughout the games.

HeartGold and SoulSilver

In HeartGold and SoulSilver, he is far less involved compared to FireRed and LeafGreen. Much similar to its namesakes Gold and Silver, Blue becomes the leader of the Viridian Gym. He still uses a variety of Pokémon. In these games, he is supposedly the strongest in Kanto.

Black 2 and White 2

In Black 2 and White 2, his role is very minor. He appears in the Pokémon World Tournament as Kanto's Champion and where he is matched up against the player to battle in the Champions Tournament.

Let's Go Pikachu and Let's Go Eevee

Blue appears various times in the game, but your first encounter with him is after defeating Brock. You encounter him in Silph Co in which you battle him. He is in professor oak’s lab to give you the ability to mega evolve. He can be battled on Viridian City Gym after defeating the champion the first time, once per day.



Main article: Blue (Adventures)

Blue has a counterpart who shares his name. He is a rival of Red, and, since the Crystal arc, he is also Viridian City's Gym Leader.

HGSS Jō's Big Adventure

Main article: Blue (JBA)



Blue as he appears in Origins.

Blue has never officially been featured in the Pokémon anime series. He is however, the basis for the character Gary Oak. Gary's appearance, attitude, and relationships with other characters has been modeled after and is similar to Blue.

Main series

Main article: Gary Oak

Blue appeared in the Anime, where he is named Gary. He is a former rival of Ash, and he makes his debut in Pokémon - I Choose You!. In the Original Series, he was based after Blue from Red and Green, while in the Advanced Generation and in the Diamond & Pearl Series, his clothes were changed to match Blue's in-game appearance in FireRed & LeafGreen.


Main article: Blue (Origins)

Blue has a counterpart in the Origins who shares his name. He is a rival of Red.


Main article: Blue (Generations)

Blue has a counterpart in Pokemon Generations who shares his name. He is based on Blue from FireRed & LeafGreen.

Masters trailer

Main article: Blue (Masters trailer)


First Battle Sprite from Gen. I

Second Battle Sprite from Gen. I

Third Battle Sprite from Gen. I

First Battle Sprite from Y

Second Battle Sprite from Y

Third Battle Sprite from Y

Battle Sprite from Gen. II







Blue in the intro to FRLG

First Battle Sprite from Gen. III

Second Battle Sprite from Gen. III

Third Battle Sprite from Gen. III

Blue in the credits for FRLG

Battle Sprite from Gen. IV

VS Sprite from Gen. IV

Battle Sprite from Gen. V

Battle Sprite from SM

Battle Sprite from PE
FRLG Blue Title




Rival Blue




VS Green SM

Blue VS PE


Red, Green and Blue

Main article: Blue's Pokémon Teams (Red/Green/Blue)


Main article: Blue's Pokémon Teams (Yellow)

Gold, Silver and Crystal

C 103 front
 Type Grass Type Psychic 
C 065 front
 Type Psychic 
C 059 front
 Type Fire 
C 112 front
 Type Ground Type Rock 
C 130 front
 Type Water Type Flying 
C 018 front
 Type Normal Type Flying 
Lv. 58 Lv. 54 Lv. 58 Lv. 56 Lv. 58 Lv. 56
Ability: Unknown Ability: Unknown Ability: Unknown Ability: Unknown Ability: Unknown Ability: Unknown
Item: None Item: None Item: None Item: None Item: None Item: None
Sunny Day Recover Roar Fury Attack Twister Wing Attack
Leech Seed Psychic Swift Sandstorm Hydro Pump Whirlwind
Egg Bomb Reflect Flamethrower Rock Slide Rain Dance Quick Attack
Solar Beam Disable Extreme Speed Earthquake Hyper Beam Mirror Move

FireRed and LeafGreen

Main article: Blue's Pokémon Teams (FireRed/LeafGreen)

HeartGold and SoulSilver

Black 2 and White 2

Aerodactyl BW
 Type Rock Type Flying 
Exeggutor BW
 Type Grass Type Psychic 
Gyarados BW
 Type Water Type Flying 
Alakazam BW
 Type Psychic 
Arcanine BW
 Type Fire 
Machamp BW
 Type Fighting 
Lv. 50 - Lv. 50 Lv. 50 Lv. 50 Lv. 50 Lv. 50
Ability: Rock Head Ability: Chlorophyll Ability: Intimidate Ability: Synchronize Ability: Intimidate Ability: Guts
Item: Choice Band Item: Life Orb Item: King's Rock Item: Focus Sash Item: Expert Belt Item: White Herb
Stone Edge Leaf Storm Waterfall Psychic Flare Blitz Superpower
Earthquake Wood Hammer Earthquake Focus Blast Close Combat Stone Edge
Ice Fang Zen Headbutt Ice Fang Shadow Ball Wild Charge Fire Punch
Fire Blast Leech Seed Outrage Reflect Extreme Speed Bullet Punch

Sun and Moon

Alakazam XY
 Type Psychic 
Aerodactyl XY
 Type Rock Type Flying 
Arcanine XY
 Type Fire 
Gyarados XY
 Type Water Type Flying 
Machamp XY
 Type Fighting 
Exeggutor XY
 Type Grass Type Psychic 
Lv. 65 Lv. 65 Lv. 65 Lv. 65 Lv. 65 Lv. 65
Ability: TBA Ability: Pressure Ability: Intimidate Ability: Intimidate Ability: TBA Ability: Chlorophyll
Item: TBA Item: TBA Item: TBA Item: TBA Item: TBA Item: TBA
Psychic Sky Drop Flare Blitz Aqua Tail Cross Chop Psychic
Future Sight Rock Slide Extreme Speed Crunch Bulk Up Leaf Storm
Shadow Ball Crunch Thunder Fang Ice Fang Knock Off Sludge Bomb
Reflect Iron Head Bulldoze Dragon Dance Poison Jab Hypnosis

Let's Go Pikachu and Let's Go Eevee

Tauros XY
 Type Normal 
Alakazam XY
 Type Psychic 
Exeggutor XY
 Type Grass Type Psychic 
Gyarados XY
 Type Water Type Flying 
Aerodactyl XY
 Type Rock Type Flying 
Charizard XY
 Type Fire Type Flying 
Lv. 66 Lv. 66 Lv. 66 Lv. 66 Lv. 66 Lv. 68
Ability: None Ability: None Ability: None Ability: None Ability: None Ability: None
Item: None Item: None Item: None Item: None Item: None Item: Charizardite Y
Double-Edge Dazzling Gleam Power Whip Waterfall Rock Slide Fire Blast
Rock Slide Psychic Light Screen Crunch Earthquake Dragon Pulse
Earthquake Reflect Stomp Earthquake Iron Tail Hyper Beam
Iron Tail Foul Play Psychic Outrage Crunch Air Slash


  • He has appeared in at least two of the main series games in every generation, with the exception of VI, although he is mentioned in X and Y.
  • He is the youngest Champion, the second is Iris.
  • The main character of the game Golden Sun: Dark Dawn, Matthew, bears a resemblance to Blue.
  • Blue doesn't always choose your weakness. In Yellow, he has to settle for an Eevee. 
  • He is the first Champion who ends up being a Gym Leader in later generation.
  • In Pokémon X and Y, a lady sitting at the table in the Pokémon Center near Magneta Plaza in Lumiose City says that Blue has come to visit Kalos to study abroad a while back.
  • It is unknown what happened to his starter Pokémon, as he is not seen using it for some reason in the later games.
    • Given that Arcanine, Gyarados, or Exeggutor is omitted from his team in Red, Blue, and FireRed and LeafGreen depending on which starter he chooses (Arcanine is replaced with Charizard, Gyarados is replaced with Blastoise, and Exeggutor is replaced by Venusaur, depending on which of the three he chooses), it is likely that the reason all three of them are on his team in future games is so that none of his three starters is officially canon.
    • The same goes for his Alakazam, except in Pokémon Gold and Silver, who is replaced by a Machamp on his team.
  • Blue is the only Gym Leader who specializes in multiple Pokémon types.
  • Blue has owned two possibly illegal Pokémon:
    • In Red and Blue, if his team includes Gyarados, said Gyarados knows both Dragon Rage and Hydro Pump at level 22 (if the player chose Bulbasaur) or level 23 (Squirtle), the latter of which the Pokémon cannot legally learn until level 43. While it is possible for Gyarados to be taught Dragon Rage early via TM (when it naturally learns the move at level 25), no such explanation can be made for it knowing Hydro Pump early.
    • In FireRed and LeafGreen, his Pidgeotto is first seen at level 17, one lower level than Pidgey is supposed to evolve at.


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