50 free Captain Underpants trivia questions with answers — literature quiz, new questions added Aug 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 50 questions with answers and explanations. Play the quiz
Q 01Dav Pilkey, creator of Captain Underpants, was born in which US state?
Ohio
He was born in Cleveland in 1966 and grew up in North Ridgeville, Ohio; the books are set in Piqua, Ohio too.
Q 02George and Harold, the two fourth graders who create Captain Underpants, have which surnames?
Beard and Hutchins
George Beard and Harold Hutchins run a comic company called Treehouse Comix, Inc.
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 05Who is turned into Captain Underpants?
The principal, Mr. Krupp
Benjamin 'Benny' Krupp is cruel and bossy, so the boys hypnotise him and things get out of hand.
Q 06What sound turns Mr. Krupp into Captain Underpants?
Fingers snapping
The trigger comes from the boys' hypnosis with the 3-D Hypno-Ring, and it keeps happening at the worst possible moments.
Q 07How do George and Harold change Captain Underpants back into Mr. Krupp?
Pour water on his head
Which is why so many adventures end with someone hunting for a bucket.
Q 08What does Captain Underpants wear?
White briefs and a red cape with black polka dots
The cape is actually a curtain from Mr. Krupp's office in the first book.
Q 09In the first book, George mail-orders the 3-D Hypno-Ring from whom?
The Li'l Wiseguy Novelty Company
The boys use it to escape punishment after Mr. Krupp catches their pranks on video.
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
The juice belongs to the alien lunch ladies Zorx, Klax and Jennifer. Before that he had no powers at all.
Q 12The three aliens who disguise themselves as cafeteria ladies are Zorx, Klax and who?
Jennifer
The plain name is the joke. They plan to turn the students into Zombie Nerds with Evil Zombie Nerd Juice.
Q 13Professor Poopypants comes from a foreign country where everyone has what?
A silly name
After his defeat he takes his grandfather's name instead: Tippy Tinkletrousers.
Q 21The first Captain Underpants book was published in which year?
1997
The second, Attack of the Talking Toilets, followed in 1999.
Q 22What is the title of the second book in the series?
Attack of the Talking Toilets
Poopypants is book four, Wedgie Woman book five and the Purple Potty People book eight.
Q 23The final book of the original series, published in 2015, is Captain Underpants and the Sensational Saga of whom?
Sir Stinks-A-Lot
In it the boys travel twenty years into the future and meet their grown-up selves and families.
Q 14After his defeat, Professor Poopypants changes his name to what?
Tippy Tinkletrousers
It was his grandfather's name, which rather defeats George's suggestion to pick a normal one. He returns in books 9 and 10.
Q 15Which teacher is hypnotised into becoming Wedgie Woman in book five?
Ms. Ribble
She is George and Harold's homeroom teacher. Another mishap with the Hypno-Ring does it, and she builds Robo-George and the Harold 2000.
Q 16Who is the super-smart classmate and inventor who is George and Harold's rival?
Melvin Sneedly
In book 11 he briefly becomes a superhero himself, Big Melvin.
Q 17Sulu, the boys' pet, is what kind of animal?
A bionic hamster
His partner Crackers is a Quetzalcoatlus from a time-travel adventure; they have three children, Tony, Orlando and Dawn.
Q 18The Turbo Toilet 2000, a giant toilet the boys drew, is brought to life by what?
A modified photocopier
The boys build the Incredible Robo-Plunger to fight it. In the movie, Poopypants grows Melvin's invention with a size ray instead.
Q 19The gym teacher at Jerome Horwitz Elementary has what fitting name?
Mr. Meaner
Mr. Fyde is the science teacher, Mr. Rected the guidance counsellor and Miss Anthrope the grumpy secretary.
Q 20How many main novels are there in the original Captain Underpants series?
12
The last, Captain Underpants and the Sensational Saga of Sir Stinks-A-Lot, came out in 2015. There are also 15 spin-offs.
Q 24Roughly how many Captain Underpants books have been sold worldwide?
Over 90 million
More than 50 million of those were in the United States, and the books have been translated into over 37 languages.
Q 25In which two consecutive years was Captain Underpants the most-challenged book in the US, per the ALA?
2012 and 2013
Complaints usually cited toilet humour and disrespect for authority. Pilkey has argued the books get reluctant readers reading.
Q 26Where did the author first invent Captain Underpants as a boy?
At a desk in the school hallway
He was often sent out of class for misbehaving. He had been diagnosed with ADHD and dyslexia as a child.
Q 27How did the author come to spell his first name 'Dav' without an 'e'?
A Pizza Hut tag left it off
He kept the misprint. His first book, World War Won, was published in 1987 after he graduated from Kent State.
Q 28As a child the author was diagnosed with dyslexia and what else?
ADHD
He has said his teachers told him he would never make a living drawing silly pictures.
Q 29Which studio made the 2017 film Captain Underpants: The First Epic Movie?
DreamWorks Animation
It came out on June 2, 2017, and made $125 million on a $38 million budget.
Q 30Who voices George Beard in the 2017 movie?
Kevin Hart
Middleditch voices Harold, Helms is Mr. Krupp and Nick Kroll plays Professor Poopypants.