Ep. 52: The Island Guardians assist in Nebby's evolution into Solgaleo at the Altar of the Sun.

52

The group gathers at the Altar of the Sun with all four Alolan Island Guardians. Lillie and Gladion request assistance to rescue their mother. Tapu Koko and the others conduct a ritual that allows little Nebby to evolve into Solgaleo, a Legendary Pokémon of Alola. Following an invitation from Solgaleo, the Pokémon School students mount its back. The Island Guardians upgrade Ash's Z-ring to a Power Z-ring. Using a new Z-Move, Solgaleo creates an Ultra Wormhole and transports the group through it.