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 Transfer Your User Data, Support

How to Claim Your Nintendo Switch Username

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

Everything you need to know about Nintendo Switch Online

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

How to gameshare on your Nintendo Switch

Nintendo account login not working - Microsoft Community

My Nintendo November Wrap-Up - News - Nintendo Official Site

How to Access the Same Pokémon UNITE Save Data on Multiple Devices

How to Add a User to Nintendo Switch

Special offers for Nintendo Switch Online members - Nintendo

Nintendo Support: How to Locate your Number for Customer Support

Forgot Parental Controls PIN on Nintendo Switch, Support