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 Setup the Nintendo Switch

Confirming your Parental Controls PIN

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

How to Create a Nintendo Account For Your Kids - Play Nintendo

How to Set Parental Controls on the Nintendo Switch

How to Change Your Nintendo Account Password, Support

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

Nintendo account login not working - Microsoft Community

How to Link Your Nintendo Account and Pokémon Trainer Club Account

Nintendo Switch, Privacy & security guide