Devil Dinosaur is a character appearing in American comic books published by Marvel Comics. Created by Jack Kirby, the character first appeared in Devil Dinosaur #1. Devil Dinosaur is depicted as resembling an enormous, crimson Tyrannosaurus-like dinosaur. The character and his inseparable ape-like friend, Moon-Boy, are natives of "Dinosaur World," a version of Earth in a parallel universe where dinosaurs and other prehistoric creatures co-exist with tribes of primitive humanoid beings. Later, Devil Dinosaur is transported to the main universe and befriends Moon Girl in the new series Moon Girl And Devil Dinosaur.