|Voiced by:||Pat Fraley|
Jest was a one-time henchman of the Joker.
Jest helped Joker in one crime spree, where the Clown Prince of Crime used his gas to render the city defenseless. Jest and his partner then robbed stores and people. He wore a special clown mask with built-in filter to prevent him from succumbing to the gas. Once Batman removed the mask, Jest breathed in the gas and became harmless.