User blog comment:Uknownada/One Piece Characters as Batman Villains/@comment-6920514-20130516055001

Crocodile as Killer Croc? I know the personality isn't a perfect match but whatever. If we're just going on personality I'd say Buggy the Clown is a good Penguin. He's pretty regularly overestimated or underestimated, relies on tools like the muggy ball(Penguin's umbrella), has his followers intimidate others for him, and they're both incredibly greedy.

Sidenote: DD is the better Joker because he's known in the underworld as Joker, has the insanely loyal follower in Monet, the flashy clothes, the smiley Jolly Roger, and is a ruthless killer.