Andreas Jabs from Germany has taken an old GameCube and retro-fitted it with a Raspberry Pi 2. He has brought the Pi’s USB ports to the front of the case so that he can attach various controllers and has 3D printed some internal components to make the whole thing fit. He has installed Recalbox on the Pi’s SD card to run games under emulation. You can view more photographs on his site (which is in German, but that’s what Google Translate is for).