Boss Biggis is the owner of a slave camp outside of Gotham. He sends his henchmen to kidnap homeless people and forced them into slavery harvesting gold ore from nearby mines. In one instance, his henchman brought in Gaff Morgan (Batman in disguise, but he had amnesia due to a blow to the head when he was captured).
Biggis locks up disobedient slaves in metal boxes to bake in the desert sun. After Bruce remembered he was Batman, he freed himself and went after Biggis shortly after defeating Biggis men. Biggis was later taken to custody.
He is usually seen eating something. Batman mocks this fact in the end of the episode upon defeating Biggis; A sudden flood leaves Biggis begging Batman not to let him drown, and Batman pulls the repulsive man to safety, saying, "When you taste prison food, you'll wish I HAD."