The MegaGear: portable NES action in a GameGear (Engadget)
Note from Auri: This is too cool not to show you :)

What do we love better than a gadget? A gadget
stuffed
inside
another gadget of course. This time we’ve got one of
those mall bought NES knockoffs, the MegaJoyIII with “76,000 NES games in 1,” planted inside a Sega GameGear case. The
hacker had to use a different LCD, and violate a few sacred laws of the ancient console wars, but pictured above we
have the the “MegaGear” at completion, rocking a bit of Contra action.