第5話: AshはLanaのPopplioの訓練を手伝い、水中移動用の水風船を作る

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Ash helps Lana train her Popplio to blow a water balloon large enough to enable undersea travel for people. During a school fishing trip, the class's Ride Pokémon are stolen by Team Rocket. Pikachu's Iron Tail frees all the Ride Pokémon, while Popplio manages to blow a massive water balloon to save them from falling onto the rocks. (Source: Wikipedia)