Ash is visiting Vermilion City, and eh can't wait to discover more about Pokémon in the lab there. Professor Cerise has so much to teach him! But there's another new student at the lab. His name is Goh, and he's the complete opposite of Ash. Everywhere Ash goes, Goh is there . . . and Professor Cerise wants then to team up and work together.

Based on the television program: Pokémon journeys: the series.