User blog comment:Drakan95/Naruto vs Batman. Epic Rap Battles: Cartoons vs History/@comment-4388002-20151007213349/@comment-5482968-20151007215323

S1E07 of Batman: The Animated Series, "The Joker's Favor", (aired September 11th, 1992) involves an overworked man road raging, not knowing the driver is The Joker. When he's confronted, The Joker offers to spare him in exchange for a favor. Time skip, Joker tracks down man, despite having gone into WPP (because Joker is a scary fuk), cashes in favor. Part of his scheme involves a woman police officer wheeling in a cake (bomb in disguise). Originally the writers were going to have dress up Joker, before deciding to make a new character instead. Thus came Harley Quinn.

/wikidump