Invincishroom

An Invincishroom is a mushroom made in Little Fungitown in Mario & Luigi: Superstar Saga. It is given out as a prize for doing well on Star 'Stache Smash. According to the proprietor of the arcade, it is made from Super Stars and 1-Up Mushrooms from the Mushroom Kingdom, though these claims are unsubstantiated. When Mario eats one, he contracts Bean Fever, a disease which affects people who are not accustomed to the food of the Beanbean Kingdom (as warned by one of the Toads casually pacing around in Little Fungitown). This disease causes the afflicted to become a Bean in three days. Thus, Luigi has to travel to Guffawha Ruins alone to find the cure, which is Crabbie Grass. After winning the Invincishroom, Invincishrooms become sold out for the rest of the game.

In Mario & Luigi: Superstar Saga + Bowser's Minions, the Invincishroom is known as an Invincibility Mushroom and it has the appearance of a Poison Mushroom. In the Minion Quest stage Find the Invincibility Mushroom!, the arcade proprietor bribes the minions to retrieve an Invincibility Mushroom from a dangerous Cave for him. Neither the proprietor nor Captain Goomba know what the Invincibility Mushroom looks like, so the minions end up retrieving a Poison Mushroom instead by accident, revealing that the real reason Mario got Bean Fever was from eating the Poison Mushroom that was mistaken for an Invincibility Mushroom.

Names in other languages
Invincibilfungo