★ The Sonic Adventure 2 Problem ★ - Dreamcast Ripping

[ItsEasyActually]

So would the chao and their parts be able to be ripped?

They can, but I have no idea where they are in the files.  I wouldn't expect them to use the weird caching functions that animated models do.

And what's the word on textures?

Dolphin has a built-in texture ripper if you're looking for SA2B textures. As for the Dreamcast release, I honestly don't know.

PuyoTools (also used in MainMemory's SA Tools Suite) can rip textures from PVM and GVM files (SA2 and SA2B texture archives respectively). If Chao textures are what you're after, they should all be in the Chao Texture PVM archive.

Also just as proof of concept, went through the Display Code for the E CHAOS (Artificial Chaos) object. Here's the model as it appears in SAMDL.

There's three other models associated with it. These are the other variants of the enemy. None except for this one load fully, and that's due to the mesh cache.