Citra 3DS used to be only an experimental emulator, but it's gotten a lot better. So much so that Pokémon Super Mystery Dungeon is playable, even at 4x the resolution on my computer. Occasionally, my FPS dropped below 100%, but not for too long at a time.
CPU: Intel(R) Core(TM) i7-6700 @ 3.4GHz
Graphics: NVIDIA GeForce GTX 960