Boo

About

Boo is a recurring character in the Mario series. They are ghostly creatures with a white and pink appearance. They are known for their ability to turn invisible when looked at directly. Boos are often found in haunted houses and castles, and they can be defeated by looking at them from behind. They first appeared in Super Mario Bros. 3 and have since become a staple in the Mario franchise, appearing in various games including Mario Kart and Mario Party.