Pokemon Season 9 Episode 31 The Ole' Berate and Switch

Team Rocket decides to go their separate ways after yet another foiled Pikachu kidnap attempt. Elsewhere, our heroes come across a one-day Pokémon Battle Tournament secretly run by Butch and Cassidy, who are having their own problems getting along. Ash signs up, unaware that while he's battling, Cassidy is preparing to swipe the competitors' Pokémon! Cassidy runs into Jessie and James, and decides to make James her new team. As for Jessie, she fast-talks her way into a partnership with Butch.