Hopefully this is the right place to ask this.
So a friend and I have tried to get this to work, I was able to forward my ports so that way he can connect to me and that usually works. The problem is when we connect the graphics for the game as well as the sound just go nuts and it becomes unplayable, usually it only happens on one side or on rare occasions it will happen to both of us. We're using just the regular SNES9x core to do this as other SNES cores don't seem to be compatible with the games we're trying to play (The games are Battletoads and Double Dragon, and TMNT IV). If anyone can offer some advice as to why this doesn't seem to work for us that would be awesome.
Also we’re both using the PC version which are identical as well as identical roms for the games.