It's never stated outright but the Eds are all thirteen years old in the movie.
Nazz's last name was revealed to be Van Bartonschmeer.
The stores that Johnny passes before taking the bus are all named after cast/crew members.
- Toomey's Tattoos: Cory Toomey, Prop Designer
- Danny's Meat Shop: Danny Antonucci, Exec. Producer, Director, A Writer, Art Direction
- Garcia's Antiques: Steve Garcia, Storyboard Artist
Keenan Christensen's final voice acting performance, he retired for another profession after the making of the film.
When Eddy is attacked by Captain Melonhead, he cries, "Jonny, wait!" He never found out that Captain Melonhead was Jonny in 'Robbin' Ed', which shows that Eddy figured out Captain Melonhead's true identity between that episode and the movie.