Other mistake: Ron Foster appears in the end credits as "Jiminiz", but his name tag much more logically says "Jimenez." (01:29:50)
Other mistake: If you look at the monks when they're training, there are no twins with a goatee amongst their ranks, but when Sho Kosugi has to fight them because the Black Ninja somehow gained the ability to shoot fireballs that turn evil, you can see that he fights and knocks out the same dude thrice, or at the very least he gets up instantly between shots. Also, they were all together when possessed, but somehow they come at him from different parts of the temple. (00:01:16 - 01:21:05)
Other mistake: This is just baffling; in the scene where Christie is wearing a rather sweat-stained pink top and Billy turns the music off asking her "Where have you been?" they are the only ones in the room, but someone out of frame throws what appears to be a puppet on Christie bed (!?). (00:45:45)
Other mistake: Christie starts killing people at the funeral, and those in attendance start running away. When it shows a couple hiding behind a car, the woman is corpsing at best, the man is flat-out laughing. (01:05:15)
Other mistake: When the ninja slices at point-blank the obese cop in the pool room, the make-up used is a single strip of blood. Obviously they wouldn't show a graphic dismemberment or decapitation, but the man here practically dies from a cut on the cheek. Men do more harm to themselves shaving. (00:38:50)
Other mistake: When the two caucasian heroes smile back at their new asian friend at the end of the movie, you can see that Lucinda Dickey's hair looks somewhat blacker and with a thicker front bang. She's wearing a wig, since it was a later reshoot, and she had already cut her hair short for her role in Breakin' (which was shot later despite ending up being released before this movie). (01:29:00)
Other mistake: During the final fight, the Black Ninja (which confusingly enough is the one wearing green, and the ninja in black is the good guy) in some shots wears pale white cadaver makeup around the eyes, and in other does not. His fingers are also constantly of a healthy color.
Other mistake: During the movie it had been made clear that Christie would pick up bruises and black spots from the fights, and they wouldn't heal in minutes. However, Lucinda Dickey's face is spotless when Jordan Bennett finds her at the temple, and she had a big shiner and cuts during the earlier scene at her house. (01:23:20)