Continuity mistake: When the Joker gets mad at Harley, the fish she uses to defend herself changes both size and shape with each shot.
Continuity mistake: The fish that Harley uses to protect herself from the Joker changes shape and size every shot.
Answer: Tim Drake's origin in the DC Animated Universe differs significantly from his origin in the comics, but it also differs greatly from Jason Todd's. This version of the character is unique to this universe, similar to many of the other supporting characters with origin stories that range from being nearly identical to the comics to being entirely different from the comics.
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