Croagunk was first seen resting outside a supermarket in Gymbaliar!. When Meowth emerged from it, Croagunk followed him to where Team Rocket was using a fake Gym to steal unsuspecting Trainers' Pokémon. Their plan was going badly as it required Jessie to win, but her Dustox kept losing, so she decided to use Croagunk and soon won many battles.
Croagunk's impression of a Politoed
After Ash and his friends entered the Gym, Croagunk lost against Ash's Aipom. Team Rocket resorted to grabbing Ash's Pikachu and running off, leaving Croagunk behind in the process. Brock was the first to notice Croagunk, and, feeling a connection, Croagunk later willingly went into