| Captain Underpants and the Big, Bad Battle of the Bionic Booger Boy (Parts 1 & 2) | |
| Author: | Dav Pilkey |
| Illustrator: | Dav Pilkey |
| Country: | United States |
| Language: | English |
| Genre: | Children's novel, Humor, Science fiction |
| Series: | Captain Underpants series |
| Publisher: | Blue Sky (US), Scholastic (US) |
| Pub Date: |
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| Media Type: | Print (Paperback) |
| Preceded By: | Captain Underpants and the Wrath of the Wicked Wedgie Woman |
| Followed By: | Captain Underpants and the Preposterous Plight of the Purple Potty People |
Captain Underpants and the Big, Bad Battle of the Bionic Booger Boy are the sixth and seventh books in the Captain Underpants series by Dav Pilkey. The first part was published on August 1, 2003, and the second part was published on September 30, 2003. The books feature the debut of George and Harold's new pets Sulu (a hamster with a bionic endoskeleton) and Crackers (a Quetzalcoatlus) who first appeared in the first and second parts respectively. The second part also features the debut of time travel in the series, which would become a core theme of the series later on.
At demonstration speech day, George and Harold show off the "Squishy"; two ketchup packets under a toilet seat. But Melvin forces everyone to watch his demonstration, the "Combine-o-Tron 2000", which he uses his hamster Sulu and a robotic hamster body he built to show off. Melvin orders Sulu to do some tricks for the class, but the hamster's able to spank Melvin himself. After noticing the scene, George and Harold adopt Sulu, who happily joins the two. Meanwhile, Ms. Ribble uses a Squishy on an already grumpy Mr. Krupp, who believes that George and Harold are responsible. When Mr. Krupp finds them in the lunchroom, Melvin almost immediately tattles on the boys and Mr. Krupp sends them to detention, causing them to make a libelous Captain Underpants comic starring Melvin.
Having read the comic, Melvin angrily goes home and builds a super-powered robot to combine himself with using the Combine-O-Tron. However, Melvin sneezes at the last second from his allergy to cats and gets combined with the robot and boogers, turning him into the Bionic Booger Boy. Eventually, he even acquires his own drinking fountain. The cold and flu season begins, however and when the class visits a tissue factory, owner Snoddy offers free tissues, but Melvin becomes gigantic as a natural defense. George turns Mr. Krupp into Captain Underpants and the man saves his secretary, Miss Edith Anthrope. Her wet kisses turn him back and Melvin devours him, but Sulu defeats Melvin using large novelty items from warehouses.
George's suggestion, reversing the batteries in the Combine-o-Tron, surprisingly works, and only three robotic booger globs fly off. However, Mr. Krupp and Melvin begin acting strangely, with Mr. Krupp bragging about the Combine-o-Tron saving the city and Melvin threatening the boys with detention. Suddenly, the globs come to life and smash the Combine-O-Tron.
The globs start chasing George, Harold, Sulu, Melvin and Mr Krupp. They reach a dead end, but where Sulu spits them out into outer space. After a number of incidents, George and Harold discover the body mix-up. Since it would take Melvin six months to build another machine, George suggests going back in time, which makes Melvin snap his fingers, causing Mr. Krupp to turn into Captain Underpants and fly away. George and Harold are forced to tell the secret and Melvin orders them to create a comic about him, telling them to give him a cool name and to not make him look stupid, before setting to build. The next day, Melvin is furious that George and Harold's comic is not what he asked for (they claim to have thought he said to give him a stupid name and to not make him look cool), but soon explains to them that if the machine's used two days in a row, something will place the world in a catastrophe. He also gives them the "Forgetchamacallit 2000", a machine to erase one's short-term memory. As well as a decoy Combine-O-Tron 2000. George and Harold decide to travel two days back to get to Melvin's Combine-O-Tron 2000. They succeed, however, Miss Singerbrains steals the machines and takes them to the police station.
However, the boys end up in the Cretaceous period and get a Quetzalcoatlus, who they nickname "Crackers". The two go to when Singerbrains is driving to the police station. George convinces her she is dreaming because of "the dinosaur's presence", etc. Harold sends Crackers back, then they erase her memory, get the Combine-O-Tron and travel to the present. Meanwhile, Captain Underpants is helping two old ladies cross the street. He successfully rescues a cat from a tree at the same time, but accidentally leaves the ladies up there. Then he costs the Purple Dragon Sing-A-Long friends their big game when he mistakes their ball for a UFO. They, and other victims of him, including Anthrope, form an angry mob. Melvin finds Captain Underpants and switches them another back.
In space, the boogers land on a spaceship, hanging on as it returns to Earth, before they start destroying the space center. Captain Underpants goes off to help, but discovers that his powers were taken by Melvin, who refuses to help unless George and Harold change the comic. Captain Underpants and the boys are cornered at a local store and starts throwing random items stacked outside. By chance, Carl is killed upon swallowing an orange. The other boogers become cautious, but Captain Underpants makes a deliberately annoying "Underpants Dance", making them climb up his chosen building, right into a well-placed orange-made Squishy.
Soon, Melvin, under the name Big Melvin, lies to the Eyewitness News crew (including spanking Captain Underpants) while George and Harold sneak back to school, returning with the machines. Captain Underpants gets his powers back, then the crew and audience's memories are erased. The angry mob find Melvin (who no longer has superpowers) and chase him in retribution. When the boys return to their clubhouse, George finds out that Harold didn't really send Crackers back and had left her with Sulu. However, George decides that she can stay in the present for just one night, but she'll have to return the next day. But the next day, when George, Harold and Sulu are ready to take Crackers back where she belongs, the time machine malfunctions.