After you complete
Mustard's Second
Trial,
Honey will announced that one of the
Dojo Students will be permanently placed in the Master Dojo Kitchen. This character is none other than the
Max Soup Chef, and he will be willing to help you make Max Soup whenever you so please. It will, however, cost you three
Max Mushrooms in order to make a batch of Max Soup, which can then be used on a Pokemon for it to gain the ability to
Gigantamax when in battle (if said Pokemon has a
Gigantamax Form). In order to make Max Soup for
Urshifu, you will need three Max Mushrooms and
Sticky Honey.
Now that you know where to find the Max Soup Chef, Click Here to learn how to make Max Soup!