Upon receiving the assistance of Solgaleo and Lunala after Nebby and Cosmog had evolved into them, everyone made their way through the Ultra Hole to rescue Lusamine. Upon reaching the end, they all ended within an unknown world.
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Ash: We're out!
Niku: The Ultra Beasts' world.
Lana: The gems are so pretty...
Sophocles: I've never seen gems like these! I'm not sure they're stone or metal.
Eevee's ears moved, as it sensed something, along with Pikachu.
Eevee: Vee!
Pikachu: Pika!
Everyone looked over and saw multiple Parasites floating around them.