So I compiled the Game & Watch emulator from RetroArch and thought I would share it with you guys! :)
Note that the games use a hardcoded border that look like the handheld system. That means a lot of the ROMs are nearly impossible to use with the border. Fortunately, many (all?) of them support zooming in on the display by pressing select.
I've tested it on my N3DS and get 60 fps! Hopefully someone with an o3DS can test for us :)
Get your ROMs here! This is supported by RetroArch and I think public domain!
A few more photos in my imgur album here.
Note: I plan on submitting my changes to RetroArch later (they were minimal, tbh) but I thought I would make a thread in the meantime. Also, I compiled a few more emulators such as fmsx, vecx, and a few others. RetroArch is so well architected it's unbelievable. Also, for some reason the cia wouldn't compile properly. Sorry, guys.