Share Word Search Captain Underpants and the Revolting Revenge of the Radioactive Robo-Boxers To create your word search for "Captain Underpants and the Revolting Revenge of the Radioactive Robo-Boxers", first select the words you want to use. Choose up to twenty words for your game by clicking on a suggested word or enter your own by typing over an existing word. Suggestions for your word search; click to add. UNDERPANTS REVENGE How do you want the words displayed in the game? Forward Down Diagonal Backward Puzzle Title