On their way to Suiren Town, Satoshi and his friends encounter a stuck Maril. After rescuing it, they meet Kotone, a Pokémon trainer from the Jouto region that is putting on a Jouto Festa. She invites them to the festa.
Kotone, a Pokémon trainer from the Jouto region travels with Satoshi and his friends near the Valley Power Plant. After a battle between Satoshi and Hikari, Kotone notices that her Maril is lost again. Will she be able to find it?