Boo Mario can float indefinitely. Tap A repeatedly to float upwards. If you shake the Wii Remote, Boo Mario will turn transparent. Use this power to pass through certain grates and walls.

Mario explores haunted houses even in space, using Boo mushrooms to save his brother Luigi and understand Boo language. Boos are fan-favorite Mario enemies present in almost all aspects of the ...

King Boo is at his best and most terrifying in Luigi's Mansion 3, where he uses Hellen Graveley to lure Mario, Luigi, Peach, and several Toads to a huge resort.