This prototype is squarer than the final model, and also
has more buttons. The control pad is unchanged, apart from the button colors.
There also appears to be a headphone jack and volume control on the side.
Very similar to the final design, but the controller ports are to the right and the cart slot is a different shape. The power button is also red instead of grey.
Again very similar, but controller ports are to the left
this time and there is an extra port on the front.