A Boo Mushroom is a special kind of Mushroom that turns Mario or Luigi into Boo Mario or Boo Luigi when eaten. Mario or Luigi turns into a Boo and can float to high places and makes himself invisible to go through walls. He turns back into his previous form if he hits light.
- Super Mario Universe
- New Super Mario Bros.: Superstar Adventure
- Super Mario Bros. 2010
- Super Mario 65
- Super Mario Universal
- Ultra Scott Galaxy
- Super Mario Galaxy 3- Bowsers Third Revenge
- New Super Mario Bros. 3: Bowser Returns
and Super Mario Galaxy/Super Mario Galaxy 2.