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An Ultra Shroom is an item found in Super Mario RPG: Legend of the Seven Stars, the Mario & Luigi series, and the Paper Mario series. This special mushroom has the same green cap as 1-Up Mushrooms (which are absent in the first three Paper Mario games).
In Super Mario RPG: Legend of the Seven Stars, Ultra Shrooms are known as Max Mushrooms, and completely refill one party member's HP when used.
In the Mario & Luigi series, Ultra Shrooms are referred to as Ultra Mushrooms. They refill 120 HP in Mario & Luigi: Superstar Saga and Mario & Luigi: Bowser's Inside Story, 80 HP in Mario & Luigi: Partners in Time and Mario & Luigi: Superstar Saga + Bowser's Minions, and 100 HP in Mario & Luigi: Dream Team and Mario & Luigi: Paper Jam.
Ultra Shrooms are found randomly throughout the Mushroom Kingdom in the first Paper Mario. Occasionally, an Amazee Dayzee will drop an Ultra Shroom when defeated in battle. Very few places sell Ultra Shrooms: in Paper Mario: The Thousand-Year Door, they can be purchased for 200 Coins each at the Deepdown Depot, the shop in Rogueport Sewers, and they can also be found in the Pianta Parlor for 67 Pianta Tokens.
In Super Paper Mario, Ultra Shrooms are found hidden within ? Blocks. Due to their high HP recovery, they are generally found before boss battles during the later chapters of the game. They heal 50 HP on contact with the player, and their carry-on equivalent is the Ultra Shroom Shake.
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