Xbox 360 emulators - SNES, GBA, NES, Gameboy and DS emulators for moded Xboxes. GBA ROMs + Sony PSP ‡ Nintendo DS & 3DS Gameboy Emulator with Multiplayer Can I play with another person by linking our computers with a direct cable in a two players game? NOTE: This page is about emulators running on the Nintendo 3DS. NH2 = Works with Ninjhax 2 / Tubehax / Ironhax / OotHax / SmashbrosHax. For Emulators that emulate the 3DS itself, see PC utilities AFAIK the only ones that could potentially work are game that have hard coded multiplayer options (none of them have wi-fi patches to mimic the link cable). They are taking advantage of the 3DS built-in hardware, which is why all this works on O3DS.
The oddity is that you are launching a DS 'facilitator' to run a GBA emulator inside that facilitator.