Editing Poison Mushroom

Poison Mushrooms made their debut in ''{{iw|mariowiki|Super Mario Bros.: The Lost Levels}}'' and has become a recurring item in later ''Super Mario'' games. They are mushrooms that deceptively resemble the [[Super Mushroom]], but with a duller color scheme and angry eyes. In ''Super Mario All Stars'' and {{iw|mariowiki|Super Mario Advance 4: Super Mario Bros. 3}}, the Poison Mushroom's cap was redesigned, featuring a skull-faced pattern, with a purple cap in the former and a blue cap in the later. Later games in the ''Super Mario'' series starting with ''{{iw|mariowiki|Mario Hoops 3-on-3}}'' adopted a purple magenta spotted cap, abandoning the skull design in the process.

Poison Mushrooms are known for being a harmful variety of Mushrooms where touching one will cause the player to take damage or lose a life. In the Japanese ''Super Mario Bros. 2'' and its later re-releases, if a player was Fire Mario or Fire Luigi and came into contact with a Poison Mushroom, they go immediately to their small forms, though this doesn't apply in ''Super Mario 3D Land''. If a player in their small forms comes into contact with one, then they will lose a life. In ''Super Mario 3D Land'' , they follow the player around, like the {{iw|mariowiki|Goombas}} in said game.

The {{iw|mariowiki|Mini Mushroom}}, introduced in ''{{iw|mariowiki|Mario Party 4}}'' (better known for their appearance in the ''{{iw|mariowiki|New Super Mario Bros.}}'' series), has an identical function to Poison Mushrooms as they are depicted in ''Smash'', but are treated more as regular power-ups than a threat, allowing Mario or Luigi to have floatier movement and, the ability to squeeze into tighter areas. Despite this, a single hit will cause the player to lose a life.

In ''Super Smash Bros. Brawl'' and [[Super Smash Bros. 4]], the fighters strike a pose while growing/shrinking, briefly lamenting their reduced size and relishing their return to normal size. Most of the items held by the player, as well as their own projectiles, will be proportionate to their lower size. Certain attacks or charge ups can be interrupted if a Poison Mushroom touches the player in the course of doing an action.  

Tiny battles appear as a feature in ''Melee's'' [[Special Smash]] and in later games onward, where all fighters become tiny under the permanent effects of a Poison Mushroom. In ''Brawl's'' Tiny [[Special Brawl]], direct attacks deal around 0.48x their normal damage, and pitch can now be altered further. In ''Smash 4's'' Tiny Special Smash, fighters still deal 0.48x their normal damage with their direct attacks. If players acquire a Poison Mushroom in that game mode, their direct attacks will deal 0.34x their normal damage. In a Giant Special Smash, acquiring a Poison Mushroom lowers a fighter's damage multiplier to 0.92x.