Black Mask [Roman Sionis] (villain); Clayface [Basil Karlo] (villain); Edgar Dempsey (villain); False Face Society (villains); Mad Bull (villain); Mad Hatter [Jervis Tetch] (villain); Serpentine (villain); Strong Man (villain); Tweedle Dee [Deever Tweed] (villain); Tweedle Dum [Dumpson Tweed] (villain); Wolf Boy (villain)