Ok, I had made a little fix on your sonic in 30 minutes. I hope you will like it. I wanna show you, what am I talking about (stomach part, nose, face, head, spikes, shades, etc.), an I hope it will help you in the future to make better sprites. Just don't give up! (Tip: After you ready with the outlines, use zoom, and fix the little parts by hand again...)

www.freewebs.com/tazar_/sonicstand.bmp

Good luck!
(Copy this link into the web bowser, and it will work)

It looks good... However the head now seems bit too small. I'll _try_ to modify Sonic to something inbetween those two... Gah, more work coming...

Yes, very much work, but if you made them nice, you're fan game will be much fans, because the Sonic and the Jazz fans will like it too (and the fighting game fans =) ). And another tip: I can't changed his hands really, but they need to be shorter.
Good luck, again!