The NES emulator "Mojo NES Lite" is designed to run games on Android devices. The main difference from other emulators is the light gun's support; unlike other emulators, Mojo NES Lite allows you to play with sound.
This emulator is easy to use; install it on your smartphone or tablet, and games can be run from an SD card. Mojo NES Lite is compatible with Android 2.0 and later, so it can be recommended to almost any user.
You can also use it to play NES games.