On the way to the Battle Arena, both James' Chimecho and May's Munchlax fall sick. They bring them to James' old summer mansion where they are attended to by James' Nanny and Pop-Pop. James has everyone play along with him when he says he is the leader of a major business. Meanwhile, even though they promised James they would stay out of trouble, Jessie and Meowth decide to steal all the Pokémon in the garden as well as Nanny and Pop-Pop's friend Mime Jr!