Pokémon : S21 | E8 – Family Determination!

Stunned after Lusamine's disappearance through an Ultra Wormhole, our heroes want to help get her back. But Gladion insists it's a family matter, and he and Lillie set out on their own rescue mission. The Pokémon School class still wants to help, though, so Kahuna Hala directs them to the Altar of the Sun on Poni Island. Meanwhile, nearing the altar, Gladion and Lillie encounter a Totem Kommo-o! With Snowy and Silvally, they defeat the Dragon-type Pokémon. When the siblings are rejoined by the rest of the gang, Ash again tries to convince Gladion to let everyone help. When Lillie agrees, Gladion finally understands… (Source: Wikipedia)