hitTesting bullets on multiple enemies seems to be another common question... you can look into AS: Collisions - HitTesting Duped MCs by SpamBurger. With my code, you can run this on each of your enemies (assuming the death animation is on frame 2)
onClipEvent (load) {
this.dead = 0;
}
onClipEvent (enterFrame) {
if (!this.dead) {//WILL ONLY BE FALSE UNTIL HIT
for (b=1000; b<1101; b++) {//LOOP THROUGH POSSIBLE BULLETS
if (this.hitTest(_root["b"+b])) {//CHECK FOR COLLISION
this.dead = 1;//PREVENT FURTHER HITS
_root["b"+b].removeMovieClip();//GET RID OF THE BULLET
this.gotoAndStop(2);
}
}
}
}
Hopefully that'll help some people out.