Boos are white round ghost enemies from the Mario franchise. The species has appeared several times in SuperMarioGlitchy4's videos. Other types of boos include Big Boos.
Note: List is incomplete
- Rich Glitch (minor)
- SM64: Cooking with Mario and Bowser 2! (minor)
- Sonic the Derphog: The Evilness of Eggman (?) (cameo)
- SM64: Cooking with Mario and Bowser 3!
- SM64: War of the fat italians 2014 (200k special!) (minor)
- SM64: Meet the luigi
- Stupid Luigi's Mansion