Hairo Satoh has managed to squeeze a Nintendo DS into an original Game Boy that still closely resembles the original hardware. DS games are playable thanks to an added card slot on the bottom, a second screen that pops out the top, and a touchscreen upgrade. Now just give it an 3DS autostereo screen and stubby joystick! Correction: It was the 3DS, not the DS, that had a stubby joystick.