So, I remember watching on YouTube a movie scene of two asian girls fighting on a random rooftop. One of them uses a enormous piece of wood to attack, and both of them start to use things to hit each other. They both have short hair and wear opposite colors, from what I can remember.
Why do I think it's a sci-fi movie: The action in this scene is pretty exaggerated, one of them is probably not "human" and I think I saw other scenes of scary creatures appearing in the same movie. I don't want to go with stereotypes and say that japanese films are really over the top when it comes to these type of scenes, cause I have a feeling that this happened in a pretty weird movie already.
I just contacted a friend who I believed saw the same scene with me when we were kids and he said something like "oh, that chinese vampire movie?". And something clicked. I do remember a white guy with blonde hair that was pretty scary and may be a vampire for what he said. But I am a hundred percent sure that the rest of the cast is asian. He was certain that the movie is chinese and I woudn't doubt cause he is obsessed with chinese martial arts since then. He also added that the girls were fighting over a teddy bear or something and the fight was pretty funny (I remember it being really intense though). I tried a lot to make him remember something else, but that's all we got.
None of us has find the original movie and we both are even more curious now.