What is the titolo of this older Anime movie??

Ok so i believe i saw this movie on animazione somewhere around 2000 2001 maybe another channel, anyways in this movie it starts off with a helicopter chasing a monster through the woods , another part i remember about it was the bad guys wore black Suits blacks pants, and they had these pills o syringes that when token they would turn into a monster. also i believe there were these two demon dudes human form that were cutting through buildings fighting each other. it sort of reminded me of hell city Shikoku. i would really really appreciate an answer ive been literally looking for a long time, also everything in my descrizione may be false lol but the dude in suit and ties was in the movie forrrr surrree thanks ppl
 jpanjuku posted più di un anno fa
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