DM235 on 23 February 2016
The DS, 3DS, Wii and Wii U all offered backward compatibility through hardware. I see no reason why they wouldn't do this on the NX. They will most likely make consumers by a Wii U Gamepad separately, just to keep costs low (for those users who don't have one).
So the answer is 75 Watts, the power draw of the Wii U.
