Rusty

Rusty is a student of Glenbrook Academy in Mr. Pryce-Jones' 3rd grade class, and the doppelganger of Buster Baxter. His first and only appearance so far was in The Return of the King.

He seems to be an equal food expert to Buster, knowing that Capon is a type of chicken.

He beat Buster in the pie eating contest because of practice expanding his stomach from giant breakfasts.

Appearance
Rusty is an aardvark similar in head shape to Arthur, but with a much darker complexion.

He wears the Glenbrook uniform with a white collared shirt, a dark blue tie, light blue V-neck shirt, and a medium blue jacket bearing the Glenbrook insignia.

Trivia

 * His stomach has an 18 Litre capacity.
 * He and several other Glenbrook students made a cameo appearance in the Library Card song of Arthur's Almost Live Not Real Music Festival.
 * He is unnamed in the show, but the chapter book based on the episode says his name is Rusty.