Susan and Mary turn Johnny and Dukey into girls so that they can win the grand prize at a roller derby match, but things quickly get difficult when a blow on the head gives Dukey amnesia, and he thinks that he is a real derby queen.

Sick of cheap cereal prizes that don't work, Johnny decides to make himself a new breakfast cereal. But everything goes haywire when Johnny decides to put in real ray guns made by his twin sisters, and the entire town of Porkbelly becomes a city of chaos and destruction of what anyone chooses to destroy.