While heading to the next island, Team Rocket concoct a plan to steal all the food from the ferry's store room. However, before they get a chance, various Water-type Pokémon appear and steal the food before them, taking it off the ferry. Ash & Co. hear the alarm and rush to help, only to find the getaway raft and watch the Pokémon get away with the food. After hearing about the acts that these pirate Pokémon partake within, Ash decides to try and stop them, with Charizard, Snivy & Pignite attempting to make them see the errors of the ways. Will they succeed?

Arriving on Big Island, the biggest island in the Decolora Archipelago, Ash & Co. encounter the rare Pokémon, Dunsparce. Ash is eager to capture it and challenges it to a battle. During which, it uses its Screech attack which disorientates Ash, causing him to fall onto Iris' floral headdress, and while Pikachu tries to attack the Dunsparce, Axew inadvertently crashes into it causing Dunsparce to escape. Ash is angered and blames Axew for this, causing Iris to get angered at Ash. Ash tries to mend fences with Iris, but Iris angrily says she's leaving and heads off with Axew. Will Ash & Iris manage to make up?