Clayface [Basil Karlo] (villain); Harley Quinn [Harleen Quinzel] (villain); Jeremiah Arkham (villain); Killer Croc [Waylon Jones] (villain); Mr. Freeze [Victor Fries] (villain); Mr. Zsasz [Victor Zsasz]; Professor Pyg [Lazlo Valentin] (villain); Riddler [Edward Nigma] (villain); Scarecrow [Jonathan Crane] (villain); Two-Face [Harvey Dent] (villain)