restrictions in vertexhacking?

[glurak15]

Hello
I've tried about 10 times to create a vertexhack of charizard with this tutorial, but it never looks like it should:
http://www.youtube.com/watch?v=HmuPtz0N1Es
I tried to do a skull charizard, so I adjusted the vertex of the wing membranes so they disapear and only the parts with the bones are seeable. I've checked the model in 3DS Max from each angles so I'm sure it was right, but when I import it in brawlbox, some of the vertex weren't on that place where I've placed them, so there were some spikes seeable.
I used 3DS Max 2008.
So now my question is, are there any restrictions how much the vertices could be adjusted or should it be possible?

[VILE]

It sounds like a patching problem.

[GentlemanPotato]

Charizards wings are hard to export properly and need many patches to get them to look right.