I thought I'd look at emulators again and found Wii U USB Helper (
www.wiiuusbhelper.com) which with a little googlefu on a title key site manages everything from sourcing game images to installing the very capable Cemu emulator. I am now playing a very decent 2 player Mario karts 8 using 2 Xbox 360 controllers.
Well worth a look imo!
Sent from my ASUS_T00P using Tapatalk