You can download DS games, not 3DS games. You can download a DS emulator that works, but not a 3DS emulator that works.
DS games are on the Internet by the hundreds, if not thousands.
Sorry for the necrobump, but this topic is relevant for me. Which emulator will run the most games with the least bugs?
Do Gameboy Advance emulators play Gameboy Color games? It would be ideal to find an emulator that plays Gameboy Original, Gameboy Color and Gameboy Advance games. I'm aware that no$GBA plays Gameboy Advance and DS but I don't know if it's compatible with original and color games.