When I try to open Miiverse after connecting to Pretendo, I get Error Code: 015-5015. It tells me to go to the Nintendo Support website so I assume something wonky happened. I also downloaded Nimbus from Universal Updater if that is known to cause issues. My 3DS also has a Nintendo Network ID still attached if that causes issues as well.
#Unable to connect to Miiverse (3DS)
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Basically do the same thing as how you log in into nintendo network
Note: create an account in https://pretendo.network/account/register not in 3ds
This won't affect my currently connected Nintendo Network ID, correct?
This is my dad's old system and I don't want him getting mad that something happened to his NNID
Well if you have the same id username as nintendo network it'll break I think
Yes
Do I select Link an Existing ID or Create a New ID?
Create an account at https://pretendo.network/account/register then press Link an Existing ID
Ok
If you did it right there should be 2 options about miis but none matters so you can just choose the top one, then it should do the stuff and then you get the wonderful "Your account is linked" thing