Ash's Palpitoad

Ash's Palpitoad made its debut in BW035. Ash found Palpitoad while trying to find some medicine for his Pokémon after Ash's Oshawott defeated the group of Tympole. Palpitoad attacked Ash and he used Oshawott to battle it after Oshawott finally opened his eyes while using Aqua Jet. He hit Palpitoad and knocked it out, and then he caught it. As Ash had a full party, Palpitoad's Poké Ball shrank and was disabled. He caught it the same time Cilan caught his Stunfisk.

Palpitoad was used in the Don Battle Tournament in BW041 where it faced off against Burgundy's Stoutland. It managed to hold its ground well and defeated Stoutland with a powerful Hydro Pump. It was proven to be a key member of his team and a true powerhouse Pokémon. In BW044, Palpitoad was up against Dino's Darumaka in the semifinals and it once again proved its power to Ash by defeating Darumaka in an instant with a single Hydro Pump.

Trivia

 * Palpitoad is the third Pokémon in the Unova Region Ash actually battled to capture, the other two being Snivy and Pidove.
 * Palpitoad is Ash's fourth dual type Pokémon
 * Palpitoad is the second of Ash's Pokémon that knows Hydro Pump; the other being Squirtle.
 * Palpitoad is the only Water-type Pokémon with secondary type that Ash has (the other one was Lapras which was released).
 * Palpitoad is the first evolved Pokémon Ash has captured in the Unova Region.
 * Palpitoad is the seventh evolved Pokémon that Ash has captured; the others are Muk, Beedrill, Pidgeotto, Primeape, and Noctowl. (Pikachu and Snorlax didn't have a pre-evolution when Ash got them).
 * Palpitoad is the first evolved Water-type Pokémon that Ash has captured.
 * Palpitoad is also the first Pokémon to be possesed by Ash, which is the same type as another starter in the same region where both these Pokémon were caught. The other Pokémon Palpitoad that is the same type element, which belongs to Ash currently in Unova is Oshawott.
 * It is the first Pokémon to be caught at the same time as another main characters Pokémon as Ash and Cilan caught both Palpitoad and Stunfisk at the same time.
 * Even though Ash has caught Palpitoad, it has rarely been used despite its power level, just like his Snivy.
 * Despite having its very first battle in the Don tournament with Ash, it seems to be very loyal and obedient to Ash. It also knew what to do and how to solve any problems.
 * Palpitoad is maybe a tribute to Misty, Ash's other old traveling companion, who has a thing for Water Pokémon and that she had a Politoed.
 * Palpitoad may also be a tribute to Brock a little because he caught a croagunk.