In 2006 in an online chat with Hey Arnold! fans, Bartlett revealed that Arnold's grandpa used his last name throughout the series, almost confirming that Arnold's last name is "Shortman".
Arnold Phillip Shortman
Shortman
Shortman.
Gerald.
I believe it's Helga G pataki
Abner
There are 5 seasons of Hey Arnold.
Try looking on google :). type the name and what episode it is.
Gerald.
angry
The character was never given a last name
It isn't revealed.
Nadine Lowenthal (voiced by Lauren Robinson) .
I believe it's Helga G pataki
Abner
Hey Arnold! was created by Craig Bartlett .
There are 5 seasons of Hey Arnold.
wild thonberris,catdog,hey arnold,
the last episode is called the journal. it is when he finds a journal of the stuff his parents did.. you can watch it on netflix.
"Watch hey Arnold" is not a question therefore cannot be answered at this time.