The Adventures of Captain Underpants/Appearences


 * Main people
 * George R. Beard - one of the main protagonists and a 4th grader at Jerome Horwitz Elementary School and Harold's best friend
 * Harold M. Hutchins - one of the main protagonists and a 4th grader at Jerome Horwitz Elementary School and George's best friend
 * Principal Krupp: Jerome Horowitz Elementary School's cruel Principal who hates George and Harold.
 * The Amazing Captain Underpants-A super hero that George and Harold create, George and Harold accidentally hypnotize Mr. Krupp into think he's Captain Underpants
 * Dr. Diaper-The short and somewhat babyish main antagonist who attempts to take over the world.
 * Minor
 * The Horwitz Knuckleheads-the school's Football team
 * Robots-The secondary antagonists and Dr.Diaper's henchmen
 * The Incredible Hunk (from the comics)
 * Students
 * Cheerleaders-They first got pepper in their pom-poms, then they sneezed, and gone home, sick.
 * The Band
 * Mr. Meaner-The school gym teacher.
 * Ms. Ribble (Also Known In The Book as "The Teacher")
 * Bank Robbers
 * The Police
 * The Game Spectators
 * Mentioned
 * Heidi Hutchins- Harold's younger sister. She is a cheerleader.
 * Boomer the Purple Dragon – the cause of the football team try to change their name from The Horwitz Knuckleheads to the Purple Dragon Sing-Along-Friends (rejected by the cheerleaders) and also a parody of Barney the Dinosaur.
 * Jason Block
 * Rosborne
 * Sturgeon General
 * "Weird Al" Yankovic (mentioned)