Three clusters of Max Mushrooms can be exchanged for a bowl of Max Soup, allowing a compatible Pokémon to gain a Gigantamax Factor, or revert their status. Feeding Max Soup to Urshifu requires that one comb of Max Honey be added to the exchange.
Max Mushrooms were added to Pokémon GO on December 3, 2024. Using one will increase the damage of the Fast Attacks, Charged Attacks, and Max Moves/G-Max Moves of the player's Dynamax/Gigantamax Pokémon during Max Battles. This effect lasts for 30 minutes.