Captain Underpants Trivia
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100 free Captain Underpants trivia questions with answers — literature quiz, new questions added Oct 2026.
40 free Captain Underpants trivia questions with answers. This Captain Underpants trivia quiz is for kids who have read every book and for the grown-ups who read them aloud. It covers George Beard and Harold Hutchins, Jerome Horwitz Elementary in Piqua, Ohio, how Mr. Krupp becomes the Waistband Warrior (and how to change him back), the 3-D Hypno-Ring, and villains from Dr. Diaper and the Talking Toilets to Professor Poopypants, Wedgie Woman and the Turbo Toilet 2000. It also asks about author Dav Pilkey, how he got his unusual first name, the 2017 movie with Kevin Hart and Ed Helms, the Netflix series, the Dog Man spin-off and the fact that the books were the most-challenged in America two years running. Most questions are easy enough for readers aged 8 to 12, with a few tougher ones at the end. Every answer was checked against a reference page and each question carries the sentence that supports it.
30 of 100 questions with answers and explanations. Play the quiz
Q 01Which other children's series about a mouse did Dav Pilkey create?
Ricky Ricotta's Mighty Robot
Ricky Ricotta's Mighty Robot stars a small mouse who is picked on at school until a giant flying robot becomes his friend. Together they take on Dr. Stinky, an evil scientist out to rule the world.
Q 02George and Harold, the two fourth graders who create Captain Underpants, have which surnames?
Beard and Hutchins
Beard and Hutchins are made up, yet they are credited in real books: Dav Pilkey presents the Dog Man series as the work of George Beard and Harold Hutchins.
Q 03In which real Ohio town do George and Harold live?
Piqua
The aliens Zorx, Klax and Jennifer try to invade it disguised as lunch ladies.
Q 04George and Harold's school, Jerome Horwitz Elementary, is named after which real person?
Curly of the Three Stooges
Jerome Horwitz was Curly's real name. The joke fits a series full of silly names.
Q 05What does Captain Underpants shout as he charges off to fight crime?
Tra-La-Laaa!
'Tra-La-Laaa!' is his battle cry, and a later villain turns it against him: she builds robots programmed to attack the moment they hear it.
Q 06What sound turns Mr. Krupp into Captain Underpants?
Fingers snapping
Fingers snapping does it every time, whoever is doing the snapping. Over the series a teacher, and even an alien clicking a tentacle, set him off by accident.
Q 07How do George and Harold change Captain Underpants back into Mr. Krupp?
Pour water on his head
Pour water on his head: the boys hit on it in the first book by emptying a flower vase over him. It works so reliably that even toilet water has turned the hero back into the principal.
Q 08Captain Underpants wears white briefs and a cape in which pattern?
Red with black polka dots
Red with black polka dots, because the cape is really a curtain: the newly hypnotised principal tears it down from his office window and ties it round his neck.
Q 09What mail-order gadget do George and Harold use to hypnotise their principal in the first Captain Underpants book?
The 3-D Hypno-Ring
The 3-D Hypno-Ring takes four to six weeks to arrive from the Li'l Wiseguy Novelty Company. The boys order it because the principal has their pranks on videotape and is blackmailing them.
Q 10The villain of the very first book wants to destroy the Moon with a Laser-Matic 2000. What is his name?
Dr. Diaper
George stops him with a slingshot loaded with fake dog poop.
Q 11From the third book on, how does Captain Underpants gain real powers such as flight?
He drinks the aliens' juice
He drinks the aliens' juice, a carton of Extra-Strength Super Power Juice the boys find on the invaders' spaceship. They give it to him as a last resort, when a giant dandelion is about to finish him off.
Q 12The three aliens who disguise themselves as cafeteria ladies are Zorx, Klax and who?
Jennifer
Jennifer is the joke: after two names straight out of science fiction, the third invader is just Jennifer. The trio take over the school kitchen and set about turning the pupils into Evil Zombie Nerds.
Q 13What turns the villain of the fourth Captain Underpants book against the world?
Q 21Which series also began in 1997, alongside Captain Underpants?
Harry Potter
Harry Potter first reached British bookshops in June 1997. The two series have something else in common: each went on to top the American Library Association's yearly list of the books people most often tried to have removed.
Q 22What is the title of the second Captain Underpants book?
Attack of the Talking Toilets
Attack of the Talking Toilets has its monsters beaten by school food: the cafeteria's creamed chipped beef, fired from a slingshot made of underwear, is foul enough to finish them off.
Q 23Which villain is named in the title of the final Captain Underpants novel, published in 2015?
Jokes about his name
Jokes about his name mean nobody will take Professor Poopypants's inventions seriously. His revenge is to force everyone else to swap their own names for ridiculous ones.
Q 14After his defeat, Professor Poopypants changes his name to what?
Tippy Tinkletrousers
Tippy Tinkletrousers was his grandfather's name, so the fresh start George suggested turned out to be no improvement at all. He returns under the new name in later books.
Q 15Which teacher is hypnotised into becoming Wedgie Woman in book five?
Ms. Ribble
Ms. Ribble, the boys' homeroom teacher, becomes the villain of their own comic because their hypnosis works backwards on women: she does the opposite of whatever she is told.
Q 16Who is the super-smart classmate and inventor who is George and Harold's rival?
Melvin Sneedly
Melvin Sneedly is also the class tattletale, and his inventions have a way of backfiring: one failed experiment fuses him with a robot and his own boogers.
Q 17Sulu, the boys' pet, is what kind of animal?
A bionic hamster
A bionic hamster: Sulu was an ordinary pet until his first owner, a classmate of the boys, fused him with a robot in one of his machines. George and Harold adopted him afterwards.
Q 18The Turbo Toilet 2000, a giant toilet the boys drew, is brought to life by what?
A modified photocopier
A modified photocopier, a classmate's entry in the school's Invention Convention, turns any picture into the real thing. The boys' comic goes through it, and their toilet villains come out alive.
Q 19The gym teacher at Jerome Horwitz Elementary has what fitting name?
Mr. Meaner
Mr. Meaner sounds like 'misdemeanor', and his full name, Kenny B. Meaner, asks the question out loud: can he be meaner?
Q 20What name do the Captain Underpants books give their page-flapping animation trick?
Flip-O-Rama
Flip-O-Rama gets a proud introduction in the books as the latest in cheesy animation technology. It takes over for the big fight, which readers animate by hand, two pages at a time.
Sir Stinks-A-Lot
Sir Stinks-A-Lot is one of the school's own teachers, turned into a giant blob by an egg salad sandwich. To beat him the boys travel into the future and fetch their grown-up selves.
Q 24Which Dav Pilkey book did his publisher withdraw in 2021, saying it perpetuated passive racism?
Ook and Gluk
Ook and Gluk, a Captain Underpants spin-off about two kung-fu cavemen, was pulled after a reader's petition. Pilkey apologised publicly and promised his earnings from the book to charity.
Q 25Captain Underpants topped America's 2012 list of most-challenged books, ahead of which adult bestseller?
Fifty Shades of Grey
Fifty Shades of Grey came fourth, drawing fewer complaints than a principal in his underpants, and the same thing happened in 2013.
Q 26Where did Dav Pilkey first invent Captain Underpants as a boy?
At a desk in the school hallway
At a desk in the school hallway, where an exasperated teacher had put him for disrupting class. He says the desk moved down the hall with him each year, and he filled the time drawing comics.
Q 27Dav Pilkey's first name lost its final 'e' on a staff name tag when he worked at which restaurant chain?
Pizza Hut
Pizza Hut's label-maker jammed on the letter when his supervisor made the tag, and the misprint stuck for good. He still says it 'Dave'.
Q 28As a child, Dav Pilkey was diagnosed with dyslexia and which other condition?
ADHD
ADHD made him a handful in class, and one teacher ripped up a comic of his, telling him he could not spend the rest of his days making silly books. He has done exactly that ever since.
Q 29Which studio made the 2017 film Captain Underpants: The First Epic Movie?
DreamWorks Animation
DreamWorks Animation made it for about $38 million, a fraction of its usual budgets, by having the animation done at outside studios in Canada and France.
Q 30Who voices George in the 2017 film Captain Underpants: The First Epic Movie?
Kevin Hart
Kevin Hart was 37 when the film came out, playing a fourth-grader. Thomas Middleditch plays Harold, and Ed Helms is the principal the two of them hypnotise.