Synopsis: Ash is trying for the Marsh Badge, but ghost Pokemon are Ash's only hope for defeating Sabrina! Unfortunately, that means that Ash has to convince a free-spirited and practical joke-loving Haunter Pokemon to help - will the joke be on Ash? Plus, Ash come face to face with a fighting Pokemon with an attitude problem - Mankey! Will Ash ever get his hat back or will his problems evolve into something bigger?