Pokémon The Series: Sun & Moon

Filling the Light with Darkness! (21x43)

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One morning, as a mysterious cloudy weather covers Alola, Satoshi notices that Professors Kukui and Burnet are feeling listless. Once he gets to the Pokémon School, he talks with his classmates, and it appears their mothers and fathers are feeling the same way. The Ultra Guardians are dispatched in order to investigate this mystery, but then a new member of the team appears.