With recent news coming from the Mario Kart Direct. Nintendo has a surprise for Wii U owners buying Mario Kart 8 on May 30th, Nintendo has decided to give you a free game for the Wii U, for either retail or e-shop purchase. You get to choose from a few titles, it includes either:
– Pikmin 3
– New Super Mario Bros. U
– The Legend of Zelda: Wind Waker HD
– Wii Party U
For  North America and in Europe there’s much more titles to choose from. Which can be seen below, to get the titles you have to register Mario Kart 8 at the Club Nintendo Website and from there you get to download directly from the e-shop.