I am using SSSL to play splatoon but I cant play because I keep getting 104-2210 and even when I delete the downloaded data it does not work. Do I need to link my pretendo account? If so how do I do that without modding my wii u?
You should have a linked PNID in most cases on Wii U. In the HOME Menu on your Pretendo profile, do you see the Nintendo Network symbol by your Mii?
If a PNID wasn’t linked, you’d get error code 102-1021.