Batman: The Enemy Within Final Battle with healthbars (Joker Vigilante Fight)
176When Batman arrives, having defeated his allies, Joker tries to get Waller to confess to Riddler's murder, believing that she had framed him in order to cover her own tracks. With her refusing, Joker threatens to drop her into one of the vats, only for Tiffany Fox to appear and confess to the murder. Though he initially disbelieves her, the evidence she presents causes him to realize she is telling the truth and he tries to kill her. When Batman steps in the way, Joker decides to attack him, only for him to be tackled over the railing by Waller. Before he falls into one of the vats, Batman catches him with his grappling gun, but Joker uses his own to reach one of the other walkways.
As he tries to escape, Waller's agents arrive to stop him. Losing faith in Batman and his war on crime, Joker attacks the agents, killing them, and embraces his new identity. With Batman standing in his way, Joker engages the vigilante in an fight, the two evenly matched with their skills and equipment. Managing to gain the upper hand, Joker moves back to try to kill Waller and Tiffany, only for Batman catch up and stop him. Chased to the control room of the plant, Joker realizes that he is destined to become a "villain" and continues to fight Batman, eventually ending with both of them severely injured. Finally defeated, Joker tells Bruce how much he really wanted to be a hero and asked whether he actually considered him a friend.