Ep. 51: Family Determination! Gladion and Lillie face a Totem Kommo-o while Ash and friends seek guidance from Kahuna Hala.

51

Following Lusamine's disappearance through an Ultra Wormhole, Gladion insists on a private rescue mission with Lillie. Meanwhile, Kahuna Hala directs the Pokémon School class to the Altar of the Sun on Poni Island. Gladion and Lillie encounter a Totem Kommo-o near the altar, defeating it with help from Snowy and Silvally. Upon reuniting with the group, Ash attempts to persuade Gladion to accept their assistance. Lillie supports Ash's request, leading Gladion to finally understand the value of their help. The siblings and the heroes then proceed together to complete the rescue effort for Lusamine.