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YMMV / Captain Underpants

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For the main series:

  • Anvilicious: Dav will never let you forget that kids need imagination and fun in their lives and it plays as much of a role in their future as having an education.
  • Awesome Music: The music video "Go Poopypants", which sums up the fourth book with one great, all around catchy song.
  • Crosses the Line Twice: Teachers abusing their kids isn't funny in theory, but when said abuse involves stealing their lunches and making them write lines like "I'm so ugly, when I was born, the doctor slapped my mom", it becomes hard not to laugh.
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  • Designated Hero: George and Harold have a tendency to slip into this with some of their pranks. In the first book, they cause enough disruption at a school football game to get the school to forfeit it, and subsequently ruin everyone else's day, and Captain Underpants is later created as a result of their attempt to avoid being punished for this. In the second book, they sabotage the school's Invention Convention out of spite because they were banned. Why were they banned? Because the previous year, they played a prank on the teachers and every other student by secretly gluing them to their chairs. These only apply to the first five books, however. As the books continue, we see more outside threats not by them or by returning villains.
  • Ensemble Dark Horse:
    • The cheerleaders from the first book due to their The Woobie status and how they reappeared in the ninth book and one of them got a name.
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    • Evil George, Evil Harold, and Captain Blunderpants (and by extension, Nice Krupp). They only appeared in the eighth book, yet there is TONS of fanart of them.
    • Kipper Krupp and his friends have garnered a bit of popularity amongst fans despite only appearing in Book 9.
    • Dog Man. After briefly being mentioned in the first book and having a comic book written about him in the ninth book, he got so much fan art that Pilkey decided to bring him back for the last two books, and eventually gave him an entire spinoff.
  • Fridge Brilliance:
    • Book 12 received a lot of praise for revealing that Future Harold is gay without making a big deal about it. Future George meanwhile has a wife that is only ever referred to as "Mrs. Beard"note . "The Beard" of course is a term referring to a woman that has married a gay man. Have fun with that, fanfic writers!
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    • The fact that women do the opposite of the instructed by the ring would make a lot of sense if it was an intentional feature because the makers believed All Men Are Perverts, but when they realized that sort of behavior can't be tied down to one gender, and so they recalled it and didn't mention it, or if it did they called it a "mistake", because they realized that feature was a huge failure in design.
    • In the fourth book, when Harold tells Captain Underpants to change his name because Poopypants says so, the Waistband Warrior insists that he "doesn't take orders from anybody", but is immediately quick to take an order from George. This might be Hypocritical Humor, or a Moment of Awesome proving how loyal he is to his allies, but doesn't let his enemies push him around. However, keep in mind that when George and Harold first hypnotized Mr. Krupp, they told him to obey their every command.
    • Professor Poopypants in the books has no clear accent when speaking, but the movie adaptation gives him a heavy German accent. Given his country of birth is given as "New Swissland," depending on how close the country is to Switzerland (ridiculous names aside), it's likely that Poopypants would've grown up with some level of fluency in a Swiss German dialect.
  • Fridge Horror: A few with the 3-D Hypno-Ring:
    • For starters, it's a consumer-level Mind-Control Device. All you have to do is trick or force the poor victim into looking at it for a few seconds and snap. Just Think of the Potential...
    • In Wrath of the Wicked Wedgie Woman, it's revealed that the ring was recalled because for unknown reasons, it worked the opposite of its wielder's intentions on women. Unfortunate Implications aside, this might seem like jumping the gun to younger readers, but George and Harold used it on their already-Sadist Teacher and look what happened. Now, what about all the other kids who had one? Chances are, the first thing a lot of them would use it on is their parents, who they typically have a very low opinion of. All of a sudden, there'd be an outbreak of Abusive Mothers all across the country because the kids demand that their every whim be catered to. That wouldn't go unnoticed and would be a pretty damn good reason to recall them.
  • Growing the Beard: The series started out as just simple harmless children's entertainment and little else. However, by the 4th and 5th books, Dav's commentary and messages become clear to more observant readers, with just enough subtlety to keep smaller readers entertained but still encouraged.
  • Heartwarming in Hindsight: In the library where the boys traveled to a different dimension, one of the books parodies the controversial children's book, Heather Has Two Mommies. Then in the 12th book, Harold marries a man with two children.
  • Heartwarming Moments: Dav Pilkey revealed that while Mr. and Mrs. Sneedly are constantly busy with their work (to the point of coming across as somewhat neglectful of their son), they actually do try their best to be Good Parents when it comes to Melvin.
  • Hilarious in Hindsight:
    • In the original EPIC NOVEL, Mr. Krupp talks of a Noodle Incident involving George and Harold rigging the school intercom to play "Weird Al" Yankovic music. Years later, he composed and performed the movie's theme song.
    • In Book 3, the boys have to deal with an army of Zombie Nerds. You can’t help but wonder if Tom Warburton read this one, seeing as how an episode of Codename: Kids Next Door has almost the exact same premise.
    • In Book 11, Melvin basically ingests some of Captain’s DNA in order to get superpowers similar to his. Now why does that sound familiar?
  • Idiosyncratic Ship Naming:
    • “Stage Floof” for Future Harold and his husband Billy.
    • “Written Symphony” for Future George and his wife Lisa.
  • It Was His Sled: Thanks to the internet, there's no hiding the fact that Harold is gay in the 12th book.
  • Jerkass Woobie: Professor Poopypants. He just wanted people to stop laughing at his name, though George and Harold point out that he could have simply changed it rather than forcing everyone else to change their name into something ridiculous.
    • All three versions of the professor have there moments in book 10. Big Tippy refuses to let either of the two Tiny Tippies help him catch Captain Underpants. The two Tiny Tippies travel to the future to use there inverse Shrink Ray to grow to there normal height so they can help Big Tippy. When Tiny Tippy grows to his normal height, he then uses the machine to grow to twice his normal height, renames himself "Supa Mega Tippy", and refuses to let Slightly Younger Tiny Tippy use the machine. Upon returning to the past, Supa Mega Tippy also betrays Big Tippy, directly causing his death.
  • LGBT Fanbase: A curious case, as the LGBT people who are fans of the series are primarily made up of people who actually read the books as children, before realizing they were LGBT, but have since flocked back to the series in recent years, both out of nostalgia and after the reveal that Harold turns out to be gay. It helps that the long hiatus gave a lot of the early readers time to grow up and "grow out" of the books, before said reveal revived their interest.
  • Misaimed Fandom: Some people tend to paint George and Harold as Designated Heroes for their constant pranking, and them getting into trouble for it as Laser-Guided Karma. However, when you take a look at the people that George and Harold prank, they don't come off as better than George and Harold when they retaliate. It has been shown that since they were kindergartners, they use their pranking methods to fight off bullies like Kipper and his gang, and practically the entire staff of Jerome Horwitz Elementary are all bullies to the students. Plus, when George and Harold face the consequences for their pranks, their punishments come off as less of Laser-Guided Karma and more of Disproportionate Retribution like when Mr. Krupp blackmails them into becoming his slaves in the first book, and when he decided to cancel final exams to ensure that one of them will be held back and the other to move on to the next grade to split their friendship apart. Honestly, even if George and Harold deserve to be punished for their constant pranking, the chances of anyone not sympathizing with them when they do get punished are slim to none.
  • Moe: Kindergardener George and Harold.
  • Moral Event Horizon: Tiny Tippy steps close to the line when he becomes Supa Mega Tippy and leaves Slightly Younger Tiny Tippy in the future, and eventually crosses it when he steals Captain Underpants from Big Tippy and leaves the latter to get blown up by his own bomb.
  • Memetic Mutation: Has its own page.
  • Nausea Fuel: Inevitable in Toilet Humour-themed series, but the Bionic Booger Boy gets special mention. His descriptive introduction is cut off when George yells at the narrator for making everyone sick.
  • Nightmare Fuel:
    • The giant man-eating dandelion in Book 3.
    • The Bad Future created by Tippy Tinkletrousers. On top of this disaster-layer cake, we also saw gigantic zombie nerd-versions of George and Harold. Also from this section of the book, Tippy is crushed, blood and all. Doubles as a Tear Jerker.
    • The narrator might be right to the fact the fight between Melvin and the Turbo Toilet 2000 may give anybody nightmares. For WEEKS.
    • The children affected by the Rid-O-Kid 2000.
  • Older Than They Think: Dav Pilkey's first drawing of Captain Underpants dates all the way back to the very events that inspired him in second grade. He drew the character in class after his teacher outright said that underwear isn't funny. When he was sitting in the hallway as punishment, he proceeded to draw an entire comic book of the character! Sadly, both of these were torn up in his face by his unamused teacher.
  • Periphery Demographic: The books have a lot of teenaged and even adult fans — both people who read the books for the first time as kids and simply never stopped enjoying them, or people who read them to kids, and found that they could enjoy the more clever, subtle humor and social commentary while the kids enjoyed the superheroes and toilet jokes.
  • Some Anvils Need to Be Dropped: Kids deserve the right to have fun, exercise their imaginations, and enjoy their childhoods without being bullied by adults.
  • Squick:
    • A grown man runs around in his underwear with two ten-year-old boys. Okay, It Makes Sense in Context, but still...
    • In-universe (and out for the readers)in Book 6. The Narrator's description of Melvin gets grosser and grosser until George yells at the Narrator to stop.
    • Taken Up to Eleven in (appropriately enough) Book 11, where the boys convince all of the teachers and faculty that they're in a dream. This prompts the grownups to release their inhibitions by performing all sorts of shenanigans in their underwear. And yes, Dav Pilkey illustrates this repeatedly...
    • When Crackers's eggs hatch and the creatures inside are half-hamster. Harold imagines different scenarios that could lead to the possibility of a bionic hamster mating with a prehistoric reptile, but George can only say "EEWWWWWWWWWW!"
  • Strawman Has a Point: While the school faculty and Melvin are deliberately written to be unlikable and get kicks of making the students miserable, their animosity towards George and Harold does serve good points (as mentioned above and below). The boys often cause unprovoked trouble to not only to the faculty, but to their fellow students as well. And as the second book shows, that includes the ones who've never done anything to provoke them.
  • Unintentionally Sympathetic: Melvin is deliberately unlikable, but there are a few fans who side with him because George & Harold do go too far with their antics.
  • They Wasted a Perfectly Good Plot: With how the book series ended, a lot of fans felt this way about Krupp and Captain Underpants never finding out that they were one and the same. It could have led to some interesting storylines with the two and might have given Krupp some character development.
  • What Do You Mean, It's Not Political?: The books are no stranger to criticizing how public schools treat conditions such as, (and especially) ADHD. Book 12 in particular makes a Bland-Name Product version of Ritalin (the villain's mind control gas that suppresses creativity and individuality). The same book makes reference to the GOP hating people who are young and different from them. In this case, it stands for Grumpy Old People, but American readers will recognize the acronym as that of the Grand Old Party, AKA the Republican Party.
  • The Woobie:
    • Kindergartner Harold. His dad's gone before the book starts, he's bullied on a daily basis, and it's all but stated he draws constantly because of everything that's happened to him. It's no wonder he's friends with George after the kid saves him.note 
    • Melvin could possibly count as a Jerkass Woobie (at least before he Took a Level in Jerkass from Book 7 onwards), as it is kind of implied in Book 6 that his parents are such workaholics, that they come across as somewhat neglectful of their only son. They didn't even seem to notice that he had become the Bionic Booger Boy until they saw his rampage on TV. And he had been the Bionic Booger Boy for what just might possibly have been a few months at that point!

For the Spin Offs:

  • Esoteric Happy Ending: The ending of The Invasion of the Potty Snatchers. Billy and Diaper Dog stop Rip Van Tinkle from destroying the city, but they never actually solve the lack of toilets problem, when the lack of toilets was the main conflict of the book in the first place. Despite this, the ending is still presented as a "happy" one.
  • Nausea Fuel: At one point in Ook and Gluk, Lily ends up barfing directly into the mouth of one of the villains.
  • Unfortunate Implications: The Asian characters in Ook and Gluk are both little more than caricatures; Master Wong is a stereotypical proverb-spouting elderly kung-fu master, his daughter Lan has no real personality outside of being the love interest for Gluk, and both of them have dashes for eyes. Dav Pilkey himself recognized this, apologized, and pulled the book from publication in the wake of increased hate crimes against Asian-Americans in early 2021.


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