Captain Underpants and the Revolting Revenge of the Radioactive Robo-Boxers: Color Edition (Captain Underpants #10)

In a post-apocalyptic world, George and Harold find themselves transformed into evil zombie nerds, facing an eternity of roaming a devastated planet. Their predicament worsens as they realize they can't rely on Captain Underpants for assistance, since their nemesis, Tippy Tinkletrousers, has thwarted their attempts to create him. The story unfolds with humor and adventure as the boys navigate their new reality and confront the challenges posed by their villainous transformation.