It's chaos on Melemele Island as a group of small, mysterious Pokémon devour all the metal in sight! Professor Oak names the new species Meltan, and after one of them takes a liking to Rowlet, Ash adds it to his team! Then, the Ultra Guardians encounter more Ultra Beasts--including one who helps save Alola from certain danger--and Lillie, Sophocles, and Mallow finally receive Z-Rings of their own. And when Professor Kukui announces the opening of the first-ever Alola Pokémon League, not everyone is happy about it: Guzma, the menacing leader of Team Skull, is determined to destroy the League before it even starts!