Cassidy (Japanese: ヤマト Yamato) is one half of the Team Rocket duo that occasionally runs across Ash Ketchum and his friends in the Pokémon anime.
Cassidy's partner is Butch, and she is one of the few that usually manages to get his name right, much to his frustration as everyone else also calls him either "Biff", "Bill", "Bob", "Hutch", "Butcher", "Patch", "Botch", or "Buffy", among others (コサンジ Kosanji in Japanese).
Cassidy and Jessie met either before or shortly after their both joining Team Rocket, and are assumed to have been rivals since then. Unlike Jessie, Cassidy keeps her cool easier and is much less prone to violent outbursts. She also often referenced to Jessie, her awareness of Giovanni's dislike towards the Trio, and that they were likely to be thrown out of Team Rocket, something that Jessie usually ignores.