Why can't I simply place one humanoid model over another's bones?

[sorcerice]

In 3DS Max 2014 I tried to place the model of one character (LInk) over the bones of another (Roy). Without even setting the weight, I found that that rotating the bones of Roy would end up moving Link's model (all I did was modify the model to "Skin," and that's it). Even though the the animation wasn't perfect, I tried to export the model and play with it in Dolphin, but the game freeze upon stage selection.

Can someone explain to me why I can't just copy and paste working models over bones? They already seemed to have weights assigned, even though they weren't perfect. I am simply curious, because from what I understand, this should theoretically work.

I know I can simply rename a FitMarth00.pac/pcs to FitRoy00.pac/pcs (Project M), so perhaps there's something to do with the bones? But if the animations work, then there shouldn't be a problem...

[Shinobu Nyan!]

You can do that, would look like crap with some complex animations but it's possible. The reason for the freeze is likely do to an error in the export or file structure.