I've seen this incarnation in clips of BTAS on YouTube and I know it's from the Warner brothers run, but I can't seem to figure out which season it's from though I think it is 4. It's voiced by Mark Hammil, and bears a resemblance to the ROTJ flashback joker, so I know it must be from a later season of BTAS. Here is the picture. The reason I ask is because I'm on a quest to find as many pictures and screenshots of this joker as possible. He's one of my top 5 favorite Joker incarnations.