Batman J flashback

It happens in the movie Batman beyond return of the joker where a hero named Batman who is a hero in a bat suit who has an enemy named the joker who is a creepy clown who is a. Villian turns Batman’s side kick Robin into a evil baby joker and Batman and batgirl attack joker and jokers sidekick Harley Quinn Harley Quinn is a girl in a jester suit who likes joker and when bat girl fights Harley Quinn they both fall down a pit and batgirl grabs Harley Quinn’s hand to save her but she accidentally lets go and Harley Quinn falls to the abyss