How to Change Your Nintendo Account Sign-In Method Preference, Support

Additional Information: Child Nintendo Accounts and supervised Nintendo Accounts that do not have a registered email address  cannot change their sign-in method—they must use their Sign-In ID to sign in.

How to Set Up the Nintendo Switch

Users, Nintendo Switch Support

How to Set Up Parental Controls on a Nintendo Switch - Support.com

Membership options, Nintendo Switch Online

Everything you need to know about Nintendo Switch Online

Nintendo Switch: How to Fix Can't Sign Into Nintendo Account

Nintendo Switch, Privacy & security guide

How to Set Up Parental Controls on a Nintendo Switch - Support.com

KoopaTV: 160,000 Hacked Nintendo Accounts and NNID Sign-Ins

How to delete, archive, and reinstall digital games on Nintendo

How to transfer save data from one Nintendo Switch system to another

How to buy Switch eShop games from different regions like Japan