Moon Boy and Devil Dinosaur – This Day In Comics
Moon-Boy was a member of the Moon Clan, a group of early humans that worshiped the Moon. When the Celestials tried to manipulate the genetics of humanity, in order to turn them into antibodies for the Celestial embryo they implanted into the Earth, they obscured the Moon, prompting Moon-Boy and his people to flee, meaning they were one of the few races of humanity that were not manipulated by the Celestials to either become Eternals, Deviants, or humans with the potential for mutation. Moon-Boy and his tribe would subsequently become hunted by other tribes of humanity.
Devil Dinosaur is a red dinosaur similar to a Tyrannosaurus Rex that was born on an alternate Earth. He has somewhat of a telepathic link to a Neanderthal named Moon-Boy, his closest friend. For a dinosaur, Devil Dinosaur is highly intelligent and seems to understand most situations.
Moon Boy and Devil Dinosaur first appeared in Devil Dinosaur #1 (January 17, 1978).