Linking Nintendo Account : r/PokemonMasters

Nintendo Account, Support

You Can Now Enable Two-Step Authentication For Your Nintendo Account

How to Sign In with Smart Device - Nintendo Switch Set Up Guide

Unable to link my NNID to any Nintendo Account. : r/3DS

Nintendo owners urged to secure accounts - BBC News

Technical Analysis: Nintendo Account-Checking Crimeware

Nintendo Accounts will 'help ease the transition' to Switch's successor, says platform holder

How to link your Nintendo Network ID and your Nintendo Account

Nintendo Switch's transition to its successor has already started through the online account system - Meristation

It's the same device and I have to do this every time I want to log into the account. What's the problem here? : r/Switch