Butch (Japanese: コサブロウ Kosaburō) is one half of the Team Rocket duo that occasionally runs across Ash and his friends in the Pokémon anime.
Butch's partner is Cassidy, and she is one of the few that usually manages to get his name right, much to his frustration. In one of the most famous running gags in the anime series, everyone else calls him either "Biff", "Bill", "Buffy", "Bob", "Hutch", "Butcher", "Patch", "Botch", "Chuck", "Footch" or "Hootch" among others (コサンジ Kosanji in Japanese). Sometimes, when she gets it right, he, by habit, tries to correct her and stops and realizes she got it right. Another time, he called himself by the wrong name when attempting to correct someone when they got it right. This, of course, annoys him to no end, so much so in the Pokémon Chronicles episode Training Daze he said in frustration, "That's it, I'm changing my name."