Theres been a few hacks of the Super Mario Bros. Two Player Edition hack if I can remember right, but I'm not sure if those count.
If they are any good (and I can find them) they could count.
Anyways, anyone know a good emulator for 4-player NES games?
I would like to stream 4player hacks using PARSEC but I can not get any emulator to work properly. Or is there another way to play 4 players online?