DC COMICS: DC Animated Universe Gotham Girls Trick or Trick

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PLOT:
Part One: Harley Quinn lies on a couch in Poison Ivy's place, bored of "kvetching about" on Halloween, of all nights, and begins sobbing over memories of what she and the Joker used to do together. Poison Ivy manages to cheer her up with a life-sized balloon of Mr. J, ordered from Real Villains—a "Halloween treat". Harley Quinn, guilty about not having gotten her anything, runs out to the pawn shop. She breaks a window, grabs a diamond necklace, and declares that it's perfect, but she still needs something for Ivy. Then she sees Batgirl nearby...