Boo Buddies

Circling Boo Buddies are many Boo Buddies in a circular formation found in Super Mario World. While making different expressions, they chase and circle around Mario and Luigi, slowing down their process. Touching any single one of the Boos that make up a Boo circle can prove to be fatal for the Mario Bros.. They are indestructable. They only appear in small rooms in Ghost Houses.

Circling Boo Buddies also make an appearance in New Super Mario Bros. Wii, in the World 5 Ghost House, where they act just like they did in Super Mario World.

Another similar Boo formation is the Boo Buddy Snake.