Another Ultra Beast, Blacephalon, has appeared in Alola and so the group set off to calm it. However, soon afterwards, another Ultra Beast, Xurkitree also appears. The two Ultra Beasts start battling with their explosive attacks. How will Ash & co. be able to calm these Ultra Beasts and get them home?

Heading back from Mt. Hokulani, Ash & co. decide to take a shortcut through a cave. However, the group gets separated from eachother causing Lillie, Mallow and Sophocles to meet a group of Alolan Sandshrew. They learn that the Sandshrew are trying to protect their cave from a Tyranitar. Lillie decides to challenge the Tyranitar on behalf of Sandshrew. Will she be able to win?