Dry Bones are skeletal versions of Koopa Troopas. These undead Koopas will often collapse when attacked, but they will soon revive themselves and become completely normal once again. Dry Bones first appeared in Super Mario Bros. 3, in which they were a simple edit of a Koopa. They have since become a very popular character among fans and a staple in Mario spin-off games. Dry Bones is ordinarily a lightweight character in games and is often accompanied by Boo. The Dry Bones emblem is a side-view of their heads.