While Ash preps up for his rematch with Brawly, Corphish pinches the ears of a Loudred, causing it to scream. Corphish, along with Pikachu, Silcoon, Torchic, Lotad and Mudkip get lost and soon they encounter a tribe of Nuzleaf. Can Ash and co. find their Pokémon before it's too late?