I didn't realize this was made with prerendered graphics. That's pretty interesting. It's not like Donkey Kong Country quality prerendering, but still. I think the Xtreme Sonic mod also uses prerendering, but I don't see many other characters doing that.
Eh. Looks close enough to me. Besides, there were Shadow Androids with multiple color patterns, including some that were just black and red, like the original Shadow. If you have a friend you hate enough to play 2P mode with, there are also a variety of extra colors to choose from.