|Book debut||King Arthur|
|Cartoon debut||"The Return of the King"|
Rusty is a student of Glenbrook Academy in Mr. Pryce-Jones's 3rd grade class. He beat Buster in the pie eating contest because of his 18-liter stomach, which he got from practice eating giant breakfasts.
His name is only revealed in the book "King Arthur".
Rusty is an aardvark similar in head shape to Arthur's, but with a much darker complexion.
He wears the Glenbrook uniform with a white collared shirt, a dark blue tie, a light blue V-neck shirt, and a medium blue jacket bearing the Glenbrook insignia.