I had this idea when I saw the Ryu skins on the Wiki for Sega Systems. All of the non-Nintendo series represented in SMBC so far has at least one game on a Sega system. I think skins should be made for these characters. There should be divided accordingly Sega Master System, Genesis, and Game Gear. For those characters not appearing on a particular system, custom sprites could be made in that system's style. So who's up for the challenge I've proposed?