Ep. 3: El profesor Kukui le entrega a Ash un Pokédex habitado por Rotom mientras el Equipo Rocket se enfrenta a una pesadilla con Mimikyu y Bewear

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Professor Kukui has a gift to help Ash get started in the Alola region. It’s an unusual Pokédex that’s inhabited by the Pokémon Rotom—a Rotom Dex! Team Rocket is just getting started in Alola, too, and their first meeting with a new Pokémon turns frightening when a mysterious Mimikyu draws Meowth into a nightmare. But when they encounter Ash and his classmates, Mimikyu decides to battle on Team Rocket’s side—until an enormous Bewear grabs Jessie and James and carries them off. Ash is a little disappointed that he couldn’t catch Mimikyu, but he soon sets off in search of more new Pokémon! (Source: Bulbapedia)