The Cartoon Hero Presents: Hey Arnold! The Jungle Movie from Cartoon Hero2 on Vimeo.
not sure if u knew but there was original details in script not in the movie such as principal wartz being involved and nadine having a subplot and sid harold and stinky have their subplot too have a where they mess around in the jungle and eventually incur the wrath of the wildlife.
I did a little checking and found that his last name was said on the series. In "Arnold Visits Arnie" Helga says "Looks like you're on shortstop, Shortman." It flew over most people's heads, including mine, by being a common nickname for Arnold.