The Adventures of Super Diaper Baby is an American children's novel by Dav Pilkey (credited as "George Beard and Harold Hutchins"), categorized as part of the author's Captain Underpants series of books as a spin-off to the series. It was published on February 5, 2002. It tells the story about an African-American baby named Billy, who got superpowers after childbirth and came along with his talking pet dog named Danger Dog, who partnered with Deputy Dangerous. Thus, they became superheroes as Diaper Baby and Diaper Dog, while Deputy Dangerous transformed into a poop and took over the world.
Plot
Introduction
Fourth graders George Beard and Harold Hutchins skate over ketchup packets in the school gym until their rude-spirited principal, Mr. Krupp, forces them to clean up the mess and meet him at his office. Since writing a sentence over and over wouldn't teach the boys anything, Mr. Krupp assigns them to write a 100-page essay on good citizenship, which they can't turn into a Captain Underpants story. The boys promptly make a story with a new superhero called "Super Diaper Baby", which angers Krupp to the point of making them write sentences.
Main plot
Expectant couple Bill and Mary Hoskins rush to the hospital while Deputy Dangerous and his talking pet dog Danger Dog drain Captain Underpants of his superpowers with Deputy's fitted ray, which then converts it to a liquid the two would consume, but Danger only drinks half of it when the police arrives, whom they both evade. Back at the hospital, Mary gives birth to a boy named Billy, whom the attending doctor accidentally throws into the power container. Billy drinks the juice, gaining the super powers and he overpowers both Deputy Dangerous and Danger Dog, both of whom are then apprehended by the police. Billy then flies back to the maternity ward.
Danger Dog and Deputy Dangerous escape to their secret lab, where the latter invents a crib device connected by satellite that they deliver to the Hoskins under euphemistic pseudonyms, "Deputy Un-Dangerous" and "Safety Dog". Billy poops before midnight, and Mary gives him a very nice bath just as the "Heat-Seeking Dish" turns on. The device transits the poop, turning Deputy Dangerous into a small piece of turd. The next morning, Deputy Dangerous invents the "Robo-Ant 2000" so he can take over the world, but Danger Dog coins the name "Deputy Doo-Doo", then changes signs around. Billy fights the robot, but is taken by Deputy Doo-Doo to a nuclear power plant. Danger Dog saves Billy, while the Ant falls into the power plant instead. Bill and Mary want to keep "Safety Dog", but the Landlord worries that Danger Dog might stain the carpet, but changes his mind when they put a diaper on him and rename him Diaper Dog.
Meanwhile, back at the power plant, radioactivity causes Deputy Doo-Doo to grow into a giant and he resumes rampaging through the city. Diaper Baby and Diaper Dog fly out to stop him, but since Deputy Doo-Doo's now radioactive, they can't touch him. They instead trick him into attacking himself and wrap him up in a giant toilet roll, sending him to Uranus. On the way back to Earth, at a "Starbutts" on Mars, they decide to take some Super Power Juice back to Earth and go to the laundromat where Captain Underpants is held captive. They restore his powers, and the world is a better place.
Characters
Billy Hoskins/Super Diaper Baby – the book's protagonist; he is a newborn baby who gains Captain Underpants' powers. Danger/Diaper Dog – the Hoskins' pet puggle and Super Diaper Baby's sidekick. He was once allied with Deputy Dangerous, but only because the villain gave him ample "kibbles". He gained superpowers by drinking half of the liquid produced by Deputy Dangerous' power-draining ray. Deputy Dangerous/Doo-Doo – the main antagonist of Book 1. He becomes a piece of poop due to a mishap in one of his attempts to steal Super Diaper Baby's powers and grows huge when he gets dumped in radioactive waste. Billy and Diaper Dog wrap him with a giant toilet paper from Bob's Toilet Paper Store and take him to Uranus, never to be heard from again. Dr. Dilbert Dinkle/Rip Van Tinkle – the main antagonist of Super Diaper Baby 2. He once was a criminal/inventor, now shunned everywhere due to his stench, as simple water-turned-urine. Dav Pilkey originally planned to name Tinkle "Pee Pee Longstockings". While attacking a giant pee-formed Dr. Dinkle, Billy and Diaper Dog push the Earth far away from the sun, making it snow and Dr. Dinkle freezes solid. Petey – a grumpy tabby cat. Petey dislikes Rip Van Tinkle's attitude and bad breath. He is the controller of the Robo Kitty and Supa - Mecha Kitty 3000. He appeared in Book 2, as well as the Dog Man novels.