Dav Pilkey is surprisingly super cool with answering fan questions on his Instagram, which has provided fans with a LOT of canon information (not to mention Fanfic Fuel).
George and Harold (and their families)
- George and Harold, like Dav Pilkey himself, have both ADHD and dyslexia.
- George's future wife in Book 12 is named Lisa.
- Harolds birthday is March 6th, and Georges is July 11th.
- Georges middle name is Robert, and Harolds is Michael.
- Before they married Future George and Future Harold respectively, Lisa and Billys full names were Lisa Bobeesa and Billy Doanbee-Ahiro.
- In Book 12, Meena and Nik (Future George and Lisas children) are 6 and 4 years old respectively, and Owen and Kei (Future Harold and Billys adopted twins) are only 3.
- Harolds Moms name is Grace, and Georges Mom and Dads names are Barbara and Moses (but his friends call him Moby).
- Georges Mom is a college teacher, and his Dad is a mechanic.
- Harolds Mom sells real estate.
- Harold's dad moved to Nevada after getting divorced.
- Harolds little sister Heidi is 6 years old.
- Harold met Billy when they were in college. They were in the same improv comedy group together.
- Billy works in theatre (he used to be an actor on a soap opera), and Lisa is a musician (she plays the viola).
- If the designs of the sock puppets in the animated series are anything to go by, Harold has heterochromia (his left eye is blue, and his right eye is green).
- Mr. Krupps birthday is April 1st, April Fool's Day.
- Mr. Krupp has a younger brother named Jasper, who is the father of Kipper.
- Personality-wise, Mr. Krupp and his brother Jasper are complete opposites.
- Mr. Krupp is around mid-forties in age.
- His height is 56.
- His parents names are John and Grace. (Its currently unknown whether or not theyre still alive during the events of the books, though...)
- Krupp also has a sister, who was mentioned in the animated series. What her name is and whether shes older or younger than him has yet to be revealed.
- The animated series confirms that he (and by extension Captain Underpants) has green eyes.
- Melvins birthday is December 25th.
- Melvins Mothers name is Cindy, and like her husband Gaylord, she is also a professor.
- Melvins middle name is Richard.
- While Mr. and Mrs. Sneedly are constantly busy with their work (to the point of coming across as somewhat neglectful of their son), they actually do try their best to be good parents when it comes to Melvin.
- The reason why Melvins family has a cat (Danderella), despite the fact that hes allergic to her, is because his parents got her before he was born, but they just didnt have the heart to get rid of her after it became clear that Melvin was allergic.
- Melvin is allergic to chocolate. He also gets a rash if he ever consumes anything with MSG.
- Mr. Meaner's full name is Kenny B. Meaner.
- A case of Ascended Fanon: Edith the Lunch Ladys birthday is February 14th.
- Professor Poopypants favorite food besides strawberry ice cream (which was shown in a deleted scene from the movie) is Limburger cheese.
- In the movies case, its spoiled food/leftovers from the cafeteria that gives you superpowers, so anyone that was brave enough to eat the cafeteria food while it was still fresh wont get superpowers. Maybe...
- Kippers friend Finksteins birthday is February 15th.
- Kippers birthday is October 3rd.