Kirby is a mail dog who is a part of Kodi's team. His first, and so far only, appearance is in Balto III.
He is the cocky member of the trio and the lead dog on the sled team. He also insists that, as the lead dog, they need to defeat Duke and his bush plane in the race, but is easily passed up in favor of Balto when he is shown as a member of the sled team that races, and beats, Duke's bush plane. Much like Kodi, he is against Balto's wishes to rescue Duke. But with some scowling from Kodi, he, as well as Dusty and Ralph, go out into the wild with him and rescues Balto and Duke from falling off an ice bridge.