Terrific Three

The Terrific Three are a group of humorus superheroes seen in "Prunella's Prediction." They consist of: Mr. Puffy, Land-Fish, and Legal Eagle. Arthur thought his Mr. Puffy sweater was funny looking, but didn't realize it was supposed to be funny. They are a parody of the Fantastic Four.

Mr. Puffy
Similar to the Michelin Man, mascot of Mitchelin Tires, he is a human-shaped puffy man, except he is green. He is bouncy, fireproof, and floats in water.

Land-Fish
A giant pink fish with a yellow shirt and purple cape. It is able to stand upright on its tailfin, and can presumably survive on land. A parody of the Land Shark skits from Saturday Night Live.

Legal Eagle
A bald eagle wearing a light blue women's business suit. She carries a briefcase.

Trivia

 * Mr. Puffy jackets currently cost a million dollars each.