Help: How do I transfer/copy MK8 data from one NNID to a different one in my Wii U?

[IIIIITHE1IIIII]

All Mario Kart 8 data including VR points is stored in your Mii. When two players play online on one system, they are both signed in to the same NNID while the different Mii's keep track on coins and points.

Hope this answers your question.