2. Condiment King
Mitchell Mayo (again, highly convenient real name) is the Condiment King. Condiment King utilises themed weapons (that often look like squeezable sauce bottles) that shoot out various condiments and he's been known to use his knowledge of condiments to create mixtures that cause anaphylactic shock in his victims. He first appeared in Batman: The Animated Series before he showed up in the comic books. He was very much a tribute to the camp, light-hearted 1960s show starring Adam West, using cheesy puns such as these:
"The big bad Bat-guy. I knew you'd ketchup to me sooner or later. How I relished this meeting. You, the dynamic dark knight versus me, the conceptual Condiment King! Come Batman. Let's see if you can cut the mustard."
His early appearances in the comics showed him to be a bit of a joke but, following a stint as an inmate of Arkham, he had been taught by Poison Ivy about spices which he put to use in his newest "recipes", which made his condiment-themed weapons more dangerous than they had previous been. That said, his theme is too stupid to work in a live action movie.