that would be caused by having a misplaced TransN bone. rename ZSS's third bone (bone index 2) to TransN, and it will fix the problem. you may want to rename the sixth bone (bone index 5) to HipN as well, to avoid throwing/being thrown problems. and of course, rename ZSS's current TransN (and HipN if you do it) to something else, that way it won't confuse Brawl and cause other problems.
Thanks for the help snoops :3
I'll give that a try and see what happens