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Captain Underpants and the Perilous Plot of Professor Poopypants facts for kids

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Captain Underpants and the Perilous Plot of Professor Poopypants
Captain Underpants Professor Poopypants.jpg
Author Dav Pilkey
Illustrator Dav Pilkey
Country United States
Language English
Series Captain Underpants series
Genre Children's novel
Publisher Blue Sky (US),
Scholastic (US)
Publication date
July 29, 2000 (black-and-white), December 29, 2015 (color edition)
Media type Print (Paperback)
Pages 160
Preceded by 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) 
Followed by Captain Underpants and the Wrath of the Wicked Wedgie Woman 

Captain Underpants and the Perilous Plot of Professor Poopypants is the fourth exciting book in the Captain Underpants series, written by the awesome Dav Pilkey. Get ready for a hilarious adventure with George and Harold, their principal Mr. Krupp, and of course, Captain Underpants!

Plot Summary

Meet Professor Poopypants

The story begins with a super smart scientist named Professor Pippy P. Poopypants. He's from a make-believe country called New Swissland, where everyone has funny names. Professor Poopypants comes to the United States with two amazing inventions: the Shrinky-Pig and the Goosy-Grow. He wants to show how these machines can help the world by shrinking garbage and growing food. But guess what? Everyone just laughs at his silly name instead of listening to his brilliant ideas!

George and Harold's Pranks

Meanwhile, at Jerome Horwitz Elementary School, George and Harold are up to their usual tricks. The whole school is supposed to go to The Piqua Pizza Palace, a cool restaurant and arcade. But George and Harold change the sign, and Mr. Krupp catches them! As punishment, they can't go on the trip. Instead, they have to clean the teachers' lounge.

Of course, George and Harold get their revenge! They set up a huge prank in the lounge. After the field trip, the teachers walk right into the trap. They end up covered in glue and foam pellets, looking like funny abominable snowmen! Mr. Fyde, the science teacher, thinks he's going crazy and quits. This means Mr. Krupp needs a new science teacher.

Professor Poopypants Becomes a Teacher

Professor Poopypants sees an advertisement for a teaching job at the school. He thinks kids will be kind and sweet. So, he applies and gets the job! But the kids at Jerome Horwitz Elementary are just like the adults. They spend days laughing at his silly name.

The professor finally gets their attention by building a robot that makes gerbils jog. But even that doesn't last long. Later, Ms. Ribble reads the story of The Pied Piper of Hamelin. This gives George and Harold an idea. They draw a comic book about Professor Poopypants trying to take over the world. This comic makes the professor lose his temper completely!

The Professor's Big Plan

Furious, Professor Poopypants uses his gerbil machine to shrink the entire school! He holds everyone hostage and plans to give them silly new names. He has a special system with three charts to make sure everyone gets a ridiculous name. George and Harold become Fluffy and Cheeseball. Captain Underpants becomes Buttercup Chickenfanny, but he refuses to change his name!

Fluffy and Cheeseball try to get Captain Underpants to steal the professor's enlarging machine. But Captain Underpants and the machine get shrunk too! The boys try to enlarge the school back to normal, but they get flicked off. Cheeseball quickly makes a paper airplane, and Fluffy enlarges it. After some dangerous moments, Captain Underpants rescues them.

Captain Underpants to the Rescue!

Fluffy then enlarges Captain Underpants to the size of a gerbil. Captain Underpants bravely defeats Professor Poopypants! When the professor is defeated, everyone's names go back to normal. The boys use the machines to bring themselves, the school, and Captain Underpants back to their regular size. But Captain Underpants gets soaked with water, turning him back into Mr. Krupp.

Professor Poopypants is arrested for his crimes. George and Harold suggest he legally change his name so no one will make fun of him anymore. He takes their advice and changes his name to his grandfather's name, Tippy Tinkletrousers. But this only makes the prisoners and police officers laugh at him even more, which makes him even angrier!

Main Characters

Here are some of the funny characters you'll meet in the book, along with their silly new names from Professor Poopypants' plan:

  • George Beard / Fluffy Toiletnose
  • Harold Hutchins / Cheeseball Wafflefanny
  • Mr. Benjamin Krupp / Mr. Lumpy Pottybiscuits
  • Captain Underpants (he never changed his name!)
  • Professor Pippy P. Poopypants / Tippy Tinkletrousers
  • Chuckles Jingleberry McMonkeyburger, Jr.
  • Stinky McMonkeyburger
  • Jiggles T. Chunkyskunks
  • Tipper Q. Zipperdripper
  • Porkbelly Funkyskunk
  • Connor Mancini / Buttercup Bananalips
  • Aaron Mancini / Stinky Bananalips
  • Ingrid Ashley / Chim-Chim Diaperbrains
  • Larry Zarrow / Booger Stinkersquirt
  • Stephanie Yarkoff / Snotty Gorillabreath
  • Robbie Staenberg / Loopy Pizzapants
  • Janet Warwick / Poopsie Chucklebutt
  • Melvin Sneedly / Pinky Pizzabrains
  • Ivana Godadebafroom / Chim-Chim Lizardtushie
  • Mr. Rected / Mr. Gizzardnose
  • Miss Labler (mentioned) / Miss Liverbuns (mentioned)
  • Ms. Tara Ribble / Ms. Falafel Gizzardtush
  • Mr. Kenny B. Meaner / Mr. Flunky Bananabuns
  • Miss Edith Anthrope / Miss Crusty Diapertush
  • Ms. Guided / Ms. Lizardnose
  • Mr. Morty Fyde / Mr. Pinky Barftush
  • Dr. Diaper (cameo) / Dr. Bubblebuns (cameo)

What's Next in the Series?

The next book in the Captain Underpants series after this one is called The Wicked Wedgie Woman, which came out in 2001.

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