Satoshi and friends have come to Cave Island so they can meet Pokémon that live in caves. There, they happen to reunite with Ibuki, the Gym Leader of Fusube Gym! Ibuki tells them she had come to the island in order to get an 'alternate-colored Crimgan', but that she got separated from her Kairyu while searching. Satoshi and friends agree to help her search for Kairyu. Although they managed to safely find Ibuki's Kairyu, it ends up fighting with Iris' Kairyu. And after that, it sets off alongside Ibuki towards a cave deep in the forest in order to continue the search for the alternate-colored Crimgan, but...!?