Ep. 10: Mega-Mega Meowth Madness!Harimaron vs. Mega Mega Nyarth!!

10

Before heading to Cyllage City, the group decides to stop by the Sycamore Pokémon Lab. Team Rocket decides to kidnap Professor Sycamore, as well as Serena and Bonnie, to pry the professor's mind for the secrets behind Mega Evolution, while Ash and Clemont have to deal with a gluttonous little Chespin with a penchant for macarons. (Source: Wikipedia)