I tested it over my home network via lan cables with four swords adventures and it worked at fullspeed with a single vba-m instance connected (after some fiddling around with the windows firewall). I did not have a single issue, but i did not test for very long or any other games. Same with Crash Bandicoot.
Chrystal Chronicles on a single machine did not work too well for me with 2 vba-m instances. The second player disconnected a lot. So i did not bother to test it over my network.
Chrystal Chronicles on a single machine did not work too well for me with 2 vba-m instances. The second player disconnected a lot. So i did not bother to test it over my network.