Go to your Homebrew Launcher (either via Cubic Ninja, Soundhax or other entry points) and launch the snes9x_3ds emulator.Place your SNES ROMs inside any folder.Copy Snes9x_3ds.3dsx, Snes9x_3ds.smdh, snes9x_3ds_top.png into the /3ds/snes9x_3ds on your SD card.It also runs on your New 3DS, and performs much faster! Use your New 3DS if you want to play SuperFX and SA-1 games! It generally supports higher compatibility than existing SNES emulators on the old 3DS, because it uses Snes9x 1.43 as a base, and is a good alternative if your existing emulators cannot play all games. It can also play games that use the SuperFX chip (Yoshi’s Island, etc), and the SA-1 chip (Super Mario RPG, Kirby’s Dreamland, Kirby Super Star) but it runs slowly. It supports games that use CX4 chip (Megaman X2/X3), and the SDD-1 chip (Star Ocean, Super Street Fighter 2 Alpha).
It runs many games at full speed (60 fps). Snes9x for 3DS is a high-compatibility SNES emulator for your Old 3DS / 2DS.