Whacko's plan to imprison all the kids in Porkbelly seems to be working when Johnny and Dukey get trapped in his No Escape prison video game. Susan and Mary need to get inside the game and reprogram the Robo Guards to set them free. Johnny enters a roller derby contest to win the prize of lifetime passes to an amusement park. Trouble is, it's a girls roller derby contest so Mary and Susan have to change Johnny and Dukey's gender. When Dukey gets stuck and believes he's Debbie Demolition the girls have to find a way to change him back.