After a Nintendo Account is connected to a user account, it is irreversible. To disconnect a Nintendo Account from a Nintendo Switch console, both the linked user account and the associated user account must be deleted.
Once you’ve created an account, you’ll be asked to choose a user name and country. You will not be able to modify the Nintendo Network ID (username) or country after your account has been established. To alter this information, you must create a new Nintendo Network ID. To establish a new Nintendo Network ID on your system, you do not
To remove your Nintendo eShop account, go to Settings/Other and scroll down. Select Delete Account from the drop-down menu. Select Delete next, then Enter Serial Number. To remove an account, type the first 10 digits of the serial number into the on-screen keyboard and hit OK.
