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| “ | In exactly twenty minutes, this laser beam will blow up the moon and send huge chunks of it crashing down upon every major city in the world! Then, I will rise from the rubble and take over the planet! | „ |
| ~ Dr. Diaper telling George, Harold and Captain Underpants his evil plan. |
Dr. Diaper is the main antagonist of The Adventures of Captain Underpants and a minor character in Captain Underpants and the Perilous Plot of Professor Poopypants.
He is an evil scientist who plans to blow up the moon using his Lazer-Matic 2000 and conquer the Earth. An alternate version of the character appears as a minor character in Captain Underpants and the Preposterous Plight of the Purple Potty People.
History[]
Dr. Diaper is a mad scientist who plans to destroy the moon with an machine called Lasermatic 2000 and have all the big hunks of it come crashing down on Earth to destroy every major city, so he can take over the planet. So he sent his robots steal a large jewel from a jewelry shop in order to used it as a power source for his machine.
However, while Dr. Diaper's robots are stealing the jewel, George and Harold were chasing Captain Underpants through the city where Captain Underpants attempt to stop the robots form robbing the jewelry shop. However when the robots are diving off in their van, it got Captain Underpants' cape gets stuck on the van’s door with George and Harold hanging on to it. They soon stop at Dr. Diaper's warehouse and Dr. Diaper ties up Captain Underpants, and make him watch the "unraveling" of his plan.
However, George flung fake dog poop at him, making him think he had an accident. As he went to change, George and Harold defeated the robots, free Captain Underpants and destroyed the machine by pulling the self-destruction. When Dr. Diaper came back, he attempts to kill George, Harold and Captain Underpants with a laser gun out of anger for them ruining his plans. However, Captain Underpants took off his underwear and threw it at Dr. Diaper's face. When the four of them escaped, just as the warehouse explode, Captain Underpants placed Dr. Diaper on a pole near the police station and put a note on him so that the police can arrest him, and Dr. Diaper is soon taken to jail.
Dr. Diaper has a cameo appearance in the fourth book, Captain Underpants and the Perilous Plot of Professor Poopypants, still locked up in jail. He is among the inmates laughing at the name of the recently-renamed-and-incarcerated Tippy Tinkletrousers.
Appearance[]
Dr. Diaper is a small, short (as if he didn't have a torso) man wearing a diaper and his hair is similar to Tippy Tinkletrousers’s hair.
Personality[]
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Gallery[]
Trivia[]
- Dr. Diaper is the only Captain Underpants antagonist whose origin remains a mystery.
- Besides Sir Stinks-A-Lot and the Bionic Booger Boy, he is the only other character that neither Harold nor George helped create. However, it could be argued that they WERE also responsible for their creation, given that they drove Melvin to seek retribution and got all of their teachers to check themselves into the Piqua Home of the Reality Challenged. Had they not done those two things, neither of those villains would have come into existence.
- The toilets were brought to live by the PATSY 2000, Zorx, Klax & Jennifer entered the school subsequent to the original cafeteria ladies resigning due to pranks played by George and Harold, Tippy Tinkletrousers was provoked into evil by George and Harold's pranks, Wedgie Woman was hypnotized, and Melvin's evil remained with Carl, Trixie, and Frankenbooger, Captain Blunderpants, Evil George, and Evil Harold served as evil counterparts to Captain Underpants, George, and Harold, and the Wedgie Magee was made up.
- Dr. Diaper makes a cameo in The Perilous Plot of Professor Poopypants as one of the inmates laughing at the title character. This makes him one of the few characters introduced in The Adventures of Captain Underpants to make more than one appearance.
- In an alternate universe where good and evil are swapped (home of Captain Blunderpants), Dr. Diaper is a nice police officer.
- In The Terrifying Re-Turn of Tippy Tinkletrousers, Tinkletrousers travels back in time and causing Mr. Krupp to lose his job as school principal. As a result, he was never turned into Captain Underpants and Dr. Diaper was never defeated. He was successful in blowing up the moon and destroying the city. However, it was revealed that he then got eaten by one of the talking toilets.
- Additionally, at the beginning of the book, Dr. Diaper was mentioned to have testified as a witness in the trial of George, Harold and Krupp for the crimes of their evil world counterparts.
- Professor Poopypants technically fills in Dr. Diaper's role in Captain Underpants: The First Epic Movie. He takes his role as the first villain who uses robots as henchmen and after that George and Harold face off against the Talking Toilets, Captain Underpants' second main villains. Near the end of the movie, he is mentioned by name in a comic read by Captain Underpants.
- In the British edition of the first book, his name is changed to Dr Nappy, which is what diapers are called outside North America.
- He is one of the rare villains that is still alive and well. The only other villains who have not been killed or eliminated are Mr. Krupp, Melvin Sneedly, Ms. Ribble, Evil George, Evil Harold, Captain Blunderpants, Kipper Krupp, his gang, and Mr. Meaner.









