Elmer J. Fapp is one of the main characters in the Elliot Goes to School series. He doesn't have "friends" in the series, but he often gets on best with the crew, especially Jimbo because they both shout about food.
Elmer is the creepiest character in the series, and is also the most random. Elmer appears friendly and is commonly found chewing on things. His known teachers are Mr. Cool, Ms. Person, and Mr. Higglesworth. At times he can lose his patience, especially with Elliot.