After completing the second trial dojo master Mustard has for you, you’ll be able to use Max Soup. He’ll task you with finding Max Mushrooms, the main ingredient in Max Soup. For every batch of soup you make, you’ll need three Max Mushrooms. You can find the chef that makes Max Soup in the kitchen of the dojo.
You can find Max Mushrooms from Courageous Cavern, Brawlers’ Cave, Forest of Focus, and Warm-up Tunnel areas on the Isle of Armor. Every time you complete three Max Raid Battles, a Max Mushroom will spawn in one of those areas.
To Gigantamax your Ushifu specifically, you’ll also need Max Honey, which is obtained from Max Raid Battles against Vespiqueen on Honeycalm Island.
Feeding any Pokémon who can Gigantamax Max Soup will remove their Gigantamax ability, making it so they Dynamax normally instead. Feeding it to Pokémon who have the potential to Gigantamax but can’t yet will then allow them to Gigantamax. Without Max Soup, you can only grab Gigantamax Pokémon from trading, Max Raid Battles, or special events.
Here’s a list of compatible Pokémon:
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