Really? Do you think iPhone's in the US have NTSC screens and iPhones in the UK have PAL screens?
PAL/NTSC are analog encoding terms and have no meaning in HDTV's or a digital display like the Wii U controller.
PAL/NTSC are terms that are simply still being used incorrectly in the gaming industry to describe something relating to region locking. Any TV made in the last 10+ years at least can display both PAL and NTSC anyways.