Other mistake: After the Joker has become a vampire, you can still see his reflection in metal poles and such while he is chasing Batman in the bloodbank. (00:47:00 - 00:49:00)
The Batman vs Dracula: The Animated Movie (2005)
1 mistake
Directed by: Sam Liu, Brandon Vietti, Michael Goguen, Seung Eun Kim
Starring: Tara Strong, Peter Stormare, Tom Kenny, Rino Romano
The Penguin: Agh! Dead guys don't do that.
Dracula: Not dead... UN-dead.
The Penguin: I think I need to UN-wet my pants.