Captain Underpants and the Big Bad Battle of the Bionic Booger Boy
 Captain Underpants and the Big Bad Battle of the Bionic Booger Boy is a two-part story in the Captain Underpants book series. Both books count as the sixth and seventh novels in the series. Sulu and Crackers are introduced as well. It introduces a plot twist as after this the novels continue off right after the previous ends.