The lobster Don was a scientific experiment, that was aimed at granting people superpowers, through cybernetics. Ramon Lefszycic and his colleague, Tadashi Fujita, were brilliant college students with a research grant and faculties near Coney Island. The two scientist's lab experiments, of using cybernetics to enhance beings, resulted in the creation of augmented abilities, human-level intelligence and strength and the ability to project small illusions for communication, for a pair of lobsters, Don and Bill.
The two scientists were infatuated with superheroin, Marvel Girl, and were upset when she transformed into the Phoenix. Attempting to create their own Marvel Girl, by kidnapping a girl and implanting cybernetics in her, the scientists performed similar experiments on Gomi, their lab assistant, trying to bestow telekinetic abilities. They failed, however, in that Gomi's cybernetics simply produced a destructive and uncontrollable bolt of kinetic energy. The scientists were denied further funding and Gomi ran away with the lobsters, rather than have them eaten.
At some point afterward, the trio became a part of the Fallen Angels, a group of petty superpowered thieves, led by the villain Vanisher. Don made friends and accompanied them on adventures, but tragedy struck when Devil Dinosaur, who joined the team following a trip to Dinosaur World, accidentally stepped on the lobster, killing him.