So this isn't something I'd expect to see anytime soon, but would it be feasible to create some form of a gba emulator that is actually emulating two GBAs at the same time, and have them able to link up? One on the TV and one on the gamepad. The idea alone isn't that unheard of, there was a Wii homebrew app called gb4gb that (while a bit primitive) was able to emulate up to 4 Game Boy(color)s at the same time, you could even link up the emulated gameboys, me and my buddy were playing Pokemon Red and Blue that way and were able to easily trade the pokemon that needed to be traded to evolve them. But I'm getting off topic. I'd think that the Wii U should be powerful enough to emulate 2 GBAs at the same time if the regular Wii was powerful enough to emulate up to 4 GBCs at the same time. I'd really love to be able to link them up too, the GBA had some really awesome multiplayer experiences that aside from Four Swords haven't had a chance to really be enjoyed in the present day, like the Mario Bros multiplayer game on every Mario Advance game, that was always a blast.