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.

Satoshi, Kasumi, and Takeshi encounter a Tunbear that is unable to control its powers. Satoshi aids Tunbear and successfully teaches it how to use its moves effectively.