Sorry guys, I had to update the mod, I forgot I thought this was another mod I'm working on and put the x, y, and z coordinates to the very top of mount chilliad. But I just re-uploaded the mod that will make him spawn at chilliad cabin at any time during the day.
Use a better skin like one of the actual ninja models available for SA, and don't put him on Mt. Chiliad. Put him instead somewhere in the city or ontop of a skyscraper for an "urban ninja"/American Ninja type battle.