Ash and Goh have arrived in Stow-on-Side. Their goal? Help Gengar to Gigantamax! They once again cross paths with the masked boy they met on the Ghost Train—he’s Allister, one of the town’s Gym Leaders! He joins our heroes on a quest through a spooky forest in search of Max Mushrooms—the main ingredient in the Max Soup that allows Pokémon to Gigantamax. After several ghostly encounters, they gather enough ingredients for Allister to make the Max Soup needed for Gengar to achieve its gigantic goal. Then it’s back to the train as Ash and Goh say farewell to their new friend and set off for their next adventure!