Circling Boo Buddies are enemies in New Super Mario Bros. Wii. They are a ring of Boos who move in a circular motion who only appear in World 5's Ghost House. There is an opening in between them, which is the only way to pass them. The Boos have different expressions on their faces, unlike regular Boos. They, like other Boos, can't be frozen with the Ice Flower nor defeated with a Fireball from a Fire Flower. They are always facing the player. Touching any of the Boos in the ring damages the player, making him lose a form or die depending on what size he is or if he has a Power-Up. They can be defeated by Starman's invincibility, however, the player must dash to their area and touch them before the power wears off.