Pokémon the Series: Sun & Moon Episode 2: The Guardian`s Challenge!
Episode 2 of 146 of Pokémon the Series: Sun & Moon, aired November 17, 2016, 25 minutes. Available with English subtitles and dub where released.
Episode summary
Ash and Pikachu have decided to enroll in the Pokémon School. One day, their classmates decide to hold a surprise welcome party for them. But in the middle of this excited party, Tapu Koko, the Pokémon known as the island's guardian deity, shows up.