Origin
Once a Hollywood stuntman, he had a bad case of hay-fever, so his doctor told him about an experimental antihistamine, which was a steroid and this lead to him gaining invulnerability, although it isn’t explained why. He used this ability to become a superhero bodyguard.
Joe Hollywood appeared in Robin.
Powers and Abilities
Joe Hollywood was an adept hand-to-hand combatant, acrobat, and was in peak human shape. He was also invulnerable.