@drakaen391 said in Net play with GBA:

Partly thinking Pokemon battle and trades

I don't think that'll work in the way you're expecting it to. RetroArch's Netplay feature is really more like synchronized screen sharing. This works great for old console games where multiple players shared a TV screen and a couch back in the day. However, most GBA games required two units to be linked and Netplay doesn't support that. An exception would be the original GameBoy emulation core, lr-tgbdual, where two distinct units are emulated on the same screen in parallel. Another possible exception that applies directly to GBA games are the titles that allowed two players to pass a GBA back and forth, such as the 'Advance Wars' series. All in all, while it's entirely possible to Netplay GBA games in RetroArch, it's probably not all that practical.