....or possibly some little shmuck wasn't supposed to have Street Fighter so he unscrewed the cartridge and replaced the top (labeled portion) of the cartridge with this Sonic one, and placed it in the Sonic case to make it appear as though it was the Sonic game?!?!
That's the scenario I'm betting on....LOL
::::::running off to check ALL son's Atari, NES, Sega, N64, & Gamecube games...this may take awhile...ha!:::::::::::::::
Thanks for the reply~