S22E12 : That's Some Spicy Island Research!

The Pokémon School class is visiting Poni Island, and everyone is excited about their upcoming research projects. Ash wants to compete in his fourth grand trial, but because the island currently has no kahuna, he plans to challenge Tapu Fini instead! While searching for the Island Guardian, he meets a Trainer named Hapu, who impresses our hero with her tenacity and battling skills. Although Hapu doesn’t share Ash’s enthusiasm, she respects his determination. And when Team Skull tries to capture a group of Oricorio, she jumps into the fray and defeats the hapless trio with just one hit!