I don't really get how people are praising this without giving any form of critique when the rigging of this model has noticeable issues.
The most noticeable issues are with the hair and the ears. You also have the HaveN bones rigged for some reason. Another issue is the lack of Final Smash eyes.
Here's an example image showing the rigging issues with an example pose.
My suggestion would be to study the rig of Brawl's Jigglypuff model, compare it to your rig, and make changes accordingly.
Yeah, I will freely admit this thing does have some issues. Before I started this, I had no idea how to even use 3DS Max at all.
I did actually have Brawl Puff's model open the entire time rigging the thing, but despite my best efforts, the ears and hair were really giving me trouble. If you have the time, do you think you could help me out?
I think part of the problem was when I used the Optimize modifier to reduce the poly count. The ear verticies weren't as easy to weight how the Brawl Model expects.
Thanks for pointing out those places to improve, O' Great King Jiggly.
EDIT: Forgot to mention: Dunno why the HaveN bones are rigged... I'll check that out myself. And for the Final Smash eyes, I figured I didn't want to increase the filesize any more than I already have (there are 10 different 256x256 eye textures in which the pupils show). Not to mention, animating all the Final Smash eye poses would be a real pain as well.