Help with the titles of three movies?

These are movies I watched when I was 8 or 9 years old (1991), First I remember that the cover of a particular movie was a guy that was holding his fists like if he had a gun but there was like electricity, I think he had sunglasses and maybe he was blonde, and also I think there was another character that could make himself very small.
A ninja movie that I can only remember that in the end the good ninja was fighting with the bad one on the roof of a tall city, the bad ninja had the regular ninja suit but also a mask, the good ninja was american. ( I don’t think is American Ninja with Dudikoff ).
Third, another ninja movie but this time the good ninja has a white suit and fights a blue ninja ( water ), green or maybe camo ( forest ), red ( fire ) and the last one is a black ninja. I also think there is a sex scene if that helps. C’mon, I was 9.