Set in the same continuity as I Choose You, The Power of Us, and Secrets of the Jungle instead of the anime TV series, Satoshi and Pikachu continue their adventure as they help out a boy named Haruto.

Satoshi arrives at a seashore and encounters an Udeppou. Before he can catch it though, Kasumi, one of Satoshi's old traveling partners, declares that she'll be the one to catch it. Satoshi and Kasumi have a Pokémon battle to decide who gets to catch Udeppou, with the battle ending in Kasumi 's favor. Later on, Kasumi decides to travel with Satoshi again.