When Harold and George turn fourth-grade teacher Ms. Ribble into an evil monster called the Wedgie Woman, she wreaks havoc on the world, giving the wedgie of doom to unsuspecting people who stand in her way--including principal-turned-superhero Captain Underpants.When Berto and Jorge turn a fourth-grade teacher into the evil Supermujer Macroel¿astica, she gives the wedgie of doom to people who stand in her way--including principal-turned-superhero Capit¿an Calzoncillos.