Poison 1-Up

A Poison 1-up is a type of Poison Mushroom only implied in Super Paper Mario. When Mario goes to The Underwhere for the first time, a Shayde will ask Mario how he got a Game Over and as him possible ways he died such as falling in a Bottomless Pit. One of these ways was "eating a Poison 1-up" which is a Poisonous 1-up Mushroom. However as said before, a Poison 1-up has never been seen in a Mario game, only mentioned. Also note, that the Poison 1-up may not even exist, and the game's writers made a mistake and confused Poison Mushroom with Poison 1-Up.