Well, it's not news that the folks here have some really hard time trying to play Final Fantasy Tactics Advance via Link.

On VBA Link 1.8.0 beta 3 (and confirmed also with the VBA-M 1030b), you can trade items and people, but a battle via link is quite unavailable, as you get to break the Link after the first movement (or a Totema summon, which I did when I was testing the Link).

A while ago, I got to know that FFTA's Link system is quite different from other games. Maybe that problem could be worked around to turn battles via Link possible?

1030B, should be stable as long as you're using TCP/Network and connecting via localhost in the second instance.

however there are numerous ways for gba link to work and we only have a few of them supported

VBA-M | NGOHQ | Post Impact Productions | TNHW | XBCD 0.2.7