User blog comment:Numnum22/DC characters with similarities to other villains:The Joker/@comment-25716198-20170112044012

There are other villains who share the similarties to him: Sweet Tooth (Twisted Metal), Hazama (BlazBlue), Yuuki Terumi (BlazBlue), Fawful (Super Mario Bros.), Tohru Adachi (Persona), Red Skull (Marvel), Kingpin (Marvel), Deadpool (Marvel), Carnage (Marvel), Cinder Fall (RWBY), Roman Torchwick (RWBY​), Darth Vader (​Star Wars​), Darth Sidious (​Star Wars), Felix (​Red vs. Blue), Handsome Jack (​Borderlands), Hisoka (Hunter x Hunter), Kefka Palazzo (​Final Fantasy), Johan Liebert (Monster), Vaas Montenegro (Far Cry 3), Jeff the Killer (Creepypasta), The Shredder (TMNT), Pennywise (It), Shogo Makishima (​Psycho-Pass), Robbie Rotten (Lazytown), and Junko Enoshima (Danganronpa).