Worst: The Creeper (New Batman Adventures)

Voiced by: Jeff Bennett

Easily the most bizarre Batman ally of all time, The Creeper, a crazed superhero created from the same chemical that turned The Joker into The Clown Prince of Crime, runs around in just striped briefs and Gossamer from the Looney Tunes draped on his back. Perhaps the worst part is he actually paid for his costume.