Carl, Trixie and Frankenbooger (The Three Robo-Boogers) – Boogers who all come from the Bionic Booger Boy. They all share a weakness to oranges, which Captain Underpants successfully used to destroy the rampaging trio of living mucus. Carl had the Bionic Booger Boy's legs, Trixie had the tentacles, and Frankenbooger had the arms. Whenever they eat, they become bigger and more evil. Frequently challenged books of the 21st century." American Library Association. Retrieved on October 25, 2013. As George and Harold are being taken away by Officer Wiggly and the Police Chief, the cops stop by Mr. Krupp's house where he is seen taking out the trash after cleaning the house from the wet soggy toilet paper. The cops rush and handcuff a confused Mr. Krupp. After their court date, George, Harold, and Mr. Krupp are arrested and sent to jail. George and Harold are sent to Piqua Juvenile Detention Center, while Mr. Krupp is sent to Piqua State Penintentary. As the three are walking through town, possibly going to see if their homes are still around so they could stay in them, Melvin appears in an Gigantic, Glow-In-The-Dark, Robo-Squid and grabs Captain Underpants and the boys. They think they are about to be in danger at the hands of Melvin again. Censors in the United States have been targeting the Captain Underpants series after the first book was released in 1997. [34] The Office of Intellectual Freedom of the American Library Association reported that Captain Underpants is the book series with the most complaints from libraries due to offensive content in the United States in 2012 and 2013. [35] Several parents accused the book of having language inappropriate for the book's target audience, children enrolled in elementary schools. [36]

Mr. Benjamin "Benny" Krupp – The cruel and mean-spirited principal of Jerome Horwitz Elementary School and the antihero of the series (usually when no real dangers are happening). He is usually depicted as an overweight man. Mr. Krupp has a deep hatred of children and also tries to protect the students at Jerome Horwitz Elementary from George and Harold's pranks. Why he is so mean to children, in general, is unknown, but it is hinted that it is because of his own troubled and dysfunctional past. Mr. Krupp's birthday is on April 1, 1951; he has a younger brother named Jasper (Kipper's father), and his parents are named John and Bernice. When Mr. Krupp was little, he performed an awful hip-hop dance at a talent show, his mother passed out fruits and vegetables to the audience so they could throw them at him because he did not watch the cows from his family farm. This leads him to become mean, cold-hearted and vow to make all kids feel just as bad as he did. His last name is a pun of the word "corrupt". When he goes by his full name, it is a pun on "bankrupt" [ citation needed]. Mr. Krupp was based on Mr. Crutch, and was supposed to be named Mr. Crutch. He was named after Mr. Crutch from Shrimps for a Day. In the film, it is revealed that he read George and Harold's comics when he confiscated them and felt they were a little funny, which explains how he knows what Captain Underpants acts like when he is hypnotized. In the film, he is voiced by Ed Helms and in the series, he is voiced by Nat Faxon. I understand that people are entitled to their own opinions about books, but it should be just that: a difference of opinion. All that’s required is a simple change. Instead of saying ‘I don’t think children should read this book,’ just add a single word: ‘I don’t think my children should read this book.’One autumn afternoon, Tippy Tinkletrousers (who is also a prisoner) is tasked to build a statue of Warden Gordon Bordon Schmorden, who is the chief jailer of the prison. Tippy does the task but instead builds "a giant robot suit". Krupp notices Tippy and he remembers and confronts him for what happened the last time when he shrunk the school and made everyone change their names. However, Krupp does not remember that he as Captain Underpants was the one to put a stop to Tippy's reign of terror that day. I think I laughed a bit too much with this book. I am, after all, an adult. An old person. I read this book for this year's banned/challenged books week. This particular book in the series features something so awful and horrendous that most kids can't handle it. I'm talking about someone who is *whispers* g-a-y. OMG!!!! No!!!

I'm happy to report that this, the proclaimed final book of the current Captain Underpants series, is a worthy ending. Captain Underpants and the Invasion of the Incredibly Naughty Cafeteria Ladies From Outer Space: Color Edition". Barnes & Noble . Retrieved January 10, 2015. The first appearance of his Rid-O-Kid 2000 bears some similarity towards the Scarecrow's reveal in the film Batman Begins where they introduce their gas compound to their unfortunate victims who are trapped in their room. On the day Tippy presents his robot suit to Gordon Shmorden, he reveals his work and climbs on to the suit and freezes everyone in his way (the same suit used at the very end of the eighth book). Tippy then grabs Mr. Krupp and forces him to spill the information of Captain Underpants and to give him the information of George and Harold's whereabouts.Wedgie Woman ( Ms. Ribble) – A villain created by George and Harold who was based on their teacher Ms. Ribble. After a second mishap with the Hypno-Ring, it convinced her that she is Wedgie Woman. At first, she has no superpowers, but after her hairstyle gets splattered with superpower juice from the third book her hair transforms into arms and she gains super-intelligence. Coggan, Devan (December 24, 2016). "Captain Underpants leaps to the big screen in exclusive first look". Entertainment Weekly . Retrieved December 25, 2016. FrankenFart vs. The Bionic Barf Bunnies from Diarrhea Land (made appearances in Captain Underpants and the Preposterous Plight of the Purple Potty People and Cat Kid Comic Club)

Robo-George and The Harold 2000 – Two giant robots built by Wedgie Woman based on George and Harold. They were fully obedient to Wedgie Woman; each had a vast arsenal of powerful weapons and gadgets and were programmed to destroy Captain Underpants once they heard him say "Tra-la-laaa!" Captain Underpants and the Invasion of the Incredibly Naughty Cafeteria Ladies from Outer Space (and the Subsequent Assault of the Equally Evil Lunchroom Zombie Nerds) (2014) [9] As expected, the toilet paper does not hold. However, George and Harold's weight balances out the cape, causing it to function as a parachute and allow them to fall down slowly. As they near the school roof, Captain Underpants is grabbed by the Deliriously Dangerous Death-defying Dandelion of Doom while George and Harold land on the school roof. Hoping to save him, they reluctantly decide to give him Extra-Strength Super Power Juice. The next time the Dandelion of Doom swings him by, he uses his newly obtained superpowers to easily defeat the garden beast. The Adventures of Ook and Gluk: Kung-Fu Cavemen from the Future (2010) (out of print as of March 2021) The series has grown increasingly self-aware, most notably of the fact that it’s so sprawling, indulgent, and reliant on past ideas. While this works, Captain Underpants‘s brand of self-deprecation has contributed to another feeling: inevitability. The evil principal Mr. Krupp was always going to hear those fateful finger snaps, and he was always going to transform into his kind-hearted, super-powered, tightie-whities-wearing alter ego. We were always going to hear George yell, “Oh no!” and his buddy Harold finish with, “Here we go again!” as they chase after our titular hero and his triumphant shouts of “Tra-la-laaaa!” As long as the Waistband Warrior could keep laughing at himself (laughing with us, that is), the books were going to keep coming.a b Fleming, Mike Jr. (February 26, 2015). "Rob Letterman Doffs 'Captain Underpants'; 'Turbo's David Soren Being Fitted For DWA Pic". Deadline. Archived from the original on March 1, 2015 . Retrieved March 5, 2015. Lee Yandoli, Krystie (March 2, 2016). "Here's A Look Inside The New "Captain Underpants" Spin-Off Story". BuzzFeed . Retrieved December 20, 2016.

Adult George and Harold rush to Mr. Krupp's house needing help, snapping their fingers. However, Mr. Krupp wasn't coming to his trance into becoming Captain Underpants due to his face being wet from scrubbing off the permanent marker off of his face as the increasingly desperate adults kept snapped their fingers several times. Mr. Krupp wanted them to go away because of them freaking him out, and saying they were acting like kids. Sir Stinks-A-Lot overheard what Mr. Krupp said and grabbed the two adults, beating them using his mecha-suit. Mr. Krupp demanded him not to kill them cause he didn't want any blood on his lawn. Adult George and Harold were able to notice that Mr. Krupp's Face was dried up and they saw their opportunity, snapping their fingers at Mr. Krupp and he finally came into his trance becoming the amazing Captain Underpants to save his friends. Captain Underpants charged and battled Sir Stinks-A-Lot in his ape suit and Sir Stinks-A-Lot was defeated with the mecha-suit destroyed and taken to jail. The following morning at school, Mr. Meaner also has robot arms and hands, having built a giant mechanical ape suit named 'The Stinky-Kong 2000'. He sprays all of the children in his classes with Rid-O-Kid 2000™, giving them all 'Attention Superfluous Lethargy Syndrome (ASLS). Mr. Krupp is delighted that Mr. Meaner has transformed all the children. Ms. Ribble asks if Rid-O-Kid 2000™ is dangerous and Mr. Meaner explains to her that it only affects children and that adults are immune to it. Old George Beard and Old Harold Hutchins rush to Mr. Krupp's house needing help. While they snap their fingers several times, Mr. Krupp doesn't become Captain Underpants due to his face and head being wet at the time. Mr. Krupp wants them to go away because to him, they are acting like kids. As this is happening, Kenny B. Meaner overhears what Mr. Krupp said, and he grabs the two adults and beats them using his ape suit. Captain Underpants is portrayed much the same way as his book self, though he is less intelligent than his book counterpart as he believes that a mime is trapped in a box and he places an old lady in a tree along with her cat instead of helping the cat out of the tree as she wanted. Unlike the books, Captain Underpants acquires his powers after getting bathed in the Nuclear Toilet Water from Professor Poopypants' Great Mech Suit instead of drinking Extra Strength Super Power Juice. Dog Man is a comedic graphic novel series created by Dav Pilkey as a full spin-off book series to the Captain Underpants series. The series is about a dog-headed cop protecting the city he resides in with his friends. The series includes eleven books, the first released in 2016 and the latest in 2023. [7] The latest book in the series is called Dog Man: Twenty Thousand Fleas Under The Sea and it was released on March 28, 2023.

In this series

When the Wedgie Woman is defeated, George and Harold tell Captain Underpants to go to the school, get dressed, and wash his face. He does that and turns into Mr. Krupp again. In 2020, ten Dog Man books (including one Cat Kid Comic Club, a spin-off) sold a total of over 3.8 million copies, 13% of the total comic book sales, as charted by BookScan. This does not include digital copies or any copy sold by Scholastic through school book fairs. [8] Captain Underpants' most notable personality trait is his jolliness. He is kind, caring, and brave. He loves and cares about children, especially George and Harold. Miss Singerbrains – Miss Singerbrains is the librarian at Jerome Horwitz Elementary School who banned all but one of the books in the library and eventually closed down the library. Her name is a pun on saying she is "missing her brains." I recommend this book and the rest of the series before it, to anyone who isn't an old-fashioned fuddy duddy or a 'Mr Krupp'.