Poison Mushroom is a Mushroom that poisons people and/or causes diabetes. It first appeared in Super Mario 64 Bloopers: Mini Italians,
The poisoned Mushroom

X holding up a Poison Mushroom in Mini Italians

where it shrunk Mario, SMG4, and X, and they had to go to the top of Bob-omb Battlefield and get a mushroom to grow back to normal size.

One later appeared in Spaghetti Law where SMG4 put it in Mario's spaghetti as a prank, but accidentally poisons the Castle Inspector who then goes all crazy before passing out and ends up banning all the spaghetti from the Mushroom Kingdom.

A Poison Mushroom being sold by a black guy also appears in Super Mario 64 Bloopers: 99.5% Crazy making Mario go all crazy.

In Yoshrooms, Mario tries to feed Yoshi a Poison Mushroom as an attempt to kill him, but Luigi tricks him to eat it as well ("Wow, what flavor is it?"). Then Mario and Yoshi go on a crazy high adventure and become BFFs.

And in Super Mario 64 Bloopers: §§ënmØÐnÅr 2 (100th vid), Toad eats one, becoming crazy.

Mario suggests in SMG4: There's Something Up With Meggy... that Meggy must have eaten one becuse she was crazy.


  • The Mushroom in Mini Italians must've been a special kind because when the plumbers ate it they shrunk, but when the Castle Inspector ate it, he didn't shrink; he passed away instead.

    The normal Poison Mushroom from Spaghetti Law. Notice the difference color, highly suggested there is two different kinds.

  • A Poison Mushroom appears in Smg4's wallpaper posted on his facebook page, however it's not the weird inverted colored one from Mini Italians.

v - e - d Objects from SMG4
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