Pokemon: Pikachu no Fushigi na Fushigi na Daibouken  

Pokemon: Pikachus Big Mysterious Adventure, Pocket Monsters: Pikachus Really Mysterious Adventure, ピカチュウのふしぎなふしぎな大冒険, Pokémon: Pikachu's Big Mysterious Adventure, Pocket Monsters: Pikachu's Really Mysterious Adventure

During playtime supervised by trainers, Pikachu and Piplup got separated from their fellow Pokemon. They then journeyed with Skitty into an unknown dimension, accompanied by Croagunk, the Pokémon of Team Rocket, and a Marill who yearned to showcase her singing talent.