First Appeared In:
Batman: Shadow of the Bat #3

Who Is He?
Originally known as Aaron Helzinger, this violent lunk gained superhuman strength, but lost his smarts, after having his brain experimented on and his amygdala (a collection of something or other in the brain that controls emotion) removed to help control his rage - good job, science! He's generally served as a henchman, given his childlike intellect.

Powers:
Extraordinary strength and stamina.

Why He's Forgotten:
How much can you do with a big strong idiot? The Incredible Hulk at least has an alter-ego to make him more interesting.