Ep. 12: La lección de playa de Kukui se vuelve caótica cuando Mareanie se une a Team Rocket

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Professor Kukui takes Ash and the other students to the beach for a special lesson. After encountering a bunch of Mareanie, the group splits up to find and observe Pokémon. Ash, Pikachu, and Rotom-Dex are searching for Pokémon to observe when they run into Team Rocket, who are under pressure from their boss to catch new Pokémon in the Alola region. One Mareanie causes trouble for Ash and his Pokémon when it decides to help Team Rocket, especially James. (Source: Wikipedia)