Mr. and Mrs. McGee are John Larry McGee's parents, who are also from Canada.
The mother wears a Canadian flag sweatshirt and has big orange hair with glasses. The father is dressed in a parka and a hat with earmuffs.
The two appear at the end of the episode Imposter's Home for Um... Make 'Em Up Pals, where they have their son John with them. The mom tells Goofball not to wander off when they're at the circus again. They put on the red noses Goofball gives them, and Bloo thinks they're new imaginary friends. They then look confusedly at Mr. Herriman.