Koopa Servant is the boss of Bowser Castle. Because Bowser is not in the castle, the Koopa is gaurding it. Koopa Servant is a Koopa Troopa that serves Bowser. However, he kept falling because of a rug. He gained a facial injury and a black eye, so he has a bandage on his face.
He attacks by throwing Spinies at Mario. The Spinies must be thrown back by ground pounding near them. you must hit his face. After a few hits, the bandage falls off and reveals a scar. A few hits later, he is defeated.
He hides in his shell. Jumping on his shell will launch him into a wall, and he shatters like normal Koopa Troopas.