William "Bill" Trooperstien: Bowser's second "right-hand man" (left-hand man?). He's kinda pathetic, but loyal. He has trouble keeping a steady girlfriend because all of his dates end in disaster. He's a Koopa Troopa who's often the brunt of Bowser's temper, and is often hurt in Bowser's tirades. He and Roger are best friends, and they first appeared alongside one another.