Well i own a GnM device and i was pretty happy with it until i found out about other carts and devices but let me tell you something, you won't be able to play any GBa game on it and so far the best thing that you can use on it besides a lot of homebrew apps that are out there is a Snes and Sega Gen Emulator to know more about that stuff look over here http://en.wikipedia.org/wiki/List_of_Nintendo_DS_Homebrew have fun with it