Pokémon: Pikachu and Pichu
Pichu to Pikachu · ピチューとピカチュウ
Synopsis
Pikachu meets the Pichu brothers and goes on an adventure through the city with them while trying to get back to the building where the rest of Ash's Pokémon are.
Studios: OLM, 4Kids Entertainment, Warner Bros. Japan
Source: VIDEO_GAME