I'm that guy, btw. Came to look at this and I saw your method Iwvi.

I used it and it works, but the sword is no longer in Lucas's hand and I'm having trouble finding what I did that screwed it up.

Nevermind I figured it out. Works perfect now.

What if I told you there are easier methods. Just open both models in brawlbox, delete some of Ness bones that lucas doesn't have and rename the different ones. Also create the bones lucas has bus ness doesn't. In short, just make sure their skeletons are the same ussing brawlbox. This way you even keep materials, and most visibility bones.

I did it this way. It worked except for the sword. How do I fix this?