Amanita

Amanitas are enemies that appear in  Super Mario RPG: Legend of the Seven Stars. They are strange, mushroom-like creatures that are mainly found in the Forest Maze.

Battle
Outside of battle, Amanitas disgused themselves as regular mushrooms that spring alive once Mario gets close to them. In battle, Amanitas can use a troublesome move called Sporocyst that can turn one of Mario's party members into a Mushroom.

Tips
Amanitas weak point is Thunder so Mallow's Thunderbolt comes in handy for wiping them out. Wearing a Trueform Pin will prevent any mushroom transformations.

Trivia

 * Amanitas are similar to an enemy from the Earthbound series which are known as Ramblin' Evil Mushrooms.