I managed to get heihachis hitboxes on link
Whenever I attack his fist will glow like heihachis and he seems to have heihachis voice patterns too (ex: when I input heihachis spinning demon he'll yell 3 times in sync with heihachis move) also strangely enough he'll do a random array of animations when performing different moves (some not even links own which baffles me)
what I did was examine heihachi's "file1" in the olk explorer and compared it to links, then i realized despite the gamecube version having only an .unk file it still had similar hex strings I was able to take note of and eventually I found the parameters to link's very own "file1" (bad explanation but it's hard to explain) So I took that portion of heihachi's hex string and put it over link's and got this. And with that we're halfway there. Oh and I think I've solved the endian mystery too, I believe if someone is able to convert heihachi's "file2.mot" to big endian I'll be able to insert it within links file972.unk
I'm pretty sure that's the only thing that's relevant to getting heihachi to work within links.unk file.
when finished I'll place the moveset over assassin, but for now I'm testing it on link.
Anyway here's a pic of him doing "rising uppercut" aka wind god fist along with his basic BB punch combo (Might make a video demonstrating it later) and if you're wondering how I got heihachi's cammand list over links, turns out it's in all versions of the game.
I'm close to solving it , so close I can taste it. If anyone can help with the info I just provided let me know.