I was going to write up my own tutorial on setting up Retroarch, but behold there already exists such a detailed guide with all the info you need about running Retroarch on the wiiu. Visit this thread: https://gbatemp.net/threads/retroarch-wiiu-wip.447670/
UPDATED FEB 23 2018
Setting up Retroarch is simple, all you gotta do is:
1) Download the latest Retroarch (Should be a file called...
[Tutorial] How to use the latest RetroArch on Wii U
UPDATED FEB 23 2018
Setting up Retroarch is simple, all you gotta do is:
1) Download the latest Retroarch (Should be a file called...
[Tutorial] How to use the latest RetroArch on Wii U