I find it pretty odd that Nintendo decided to start enforcing region locking on their handhelds with the 3DS. All their previous handheld consoles (except the DSi, but DSi enhanced games could be played on a regular DS) were region free.
I quite enjoy the Wii U, even though I haven't played many games on it. But I know both SSB4 and Yoshi's Woolly World will both make great additions to my Wii U game collection.