Koopa Troopas are common enemies in the Super Mario series that resemble a turtle. They walk around on their two feet and if tapped twice on its shell, Koopa Troopa will spin around trying to home into the nearest person. They originally walked on four feet, which is rarely seen in later titles. Usually, a Koopa Troopa has a green shell, but there are also red and blue variants, as well as Dry Bones, a skeleton Koopa Troopa. Their Koopa Shell can be used as items. Koopas serve as Bowser's main u