Okay, so I figured out getting a European copy of Super Mario All-Stars would be cheaper than finding an American copy, but I hear that some Nintendo published games like the European Donkey Kong Country don't work on the Retro Duo. Instead it shows a screen saying something about piracy or how the game wasn't meant for your system.

My question is, does Super Mario All-Stars have this? Oh, and European NES games work on the Retro Duo and similar systems, right?