In a sumo-sized mix-up, the big-bottomed bros believe that Bad, Inc. has turned Prima into a small, glass figurine. They battle their way into Bad, Inc. to get Dr. Stinger to turn Prima back. But he can't. Instead he turns the figurine into a huge monster, which sets about smashing the city and spanking the Sumos' butts for fear of hurting "Prima." Luckily, Prima returns from her Spring Break vacation and the Sumos leap smash the figurine to smithereens.