Octoboo

Octoboo appeared in 2010 video game called Super Mario Galaxy 2. Octoboos are Boos shaped like Octoombas that appear in Super Mario Galaxy 2. They primarily move around by floating in a set area. Octoboos cannot be defeated; they become transparent, however, when the player uses a spin near them or from Yoshi's tongue. Octoboos also make small Octoomba sounds if Mario or Luigi is close to them. Unlike most members of the Octoomba family, they do not spit rocks.