This emulator is specially designed in order to work for the devices which have Android 6.0 or Marshmallow and above running on them. Additionally, this emulator also supports games for the OUYA gaming consoles. NDS4droid comprises many different additional features which include features such as saving states and in-built action replay cheat. It provides a wealth of information for the developers to bring into action for the betterment of the emulator market.
The bad news is that it has recently not stopped receiving frequent updates but the source code is readily available to the public for free. NDS4droid has been operating in the gaming market for a really long time now.
Best Nintendo DS Emulators for Android NDS4droid: