If you cannot link a Nintendo Account using the Link button, please try the following steps.
- Use a web browser to access https://accounts.nintendo.com/
- Select Create a Nintendo Account to make an account
Note: If you already have a Nintendo Account, please log in. - Launch Super Mario Run
- In Super Mario Run, on the upper right of the kingdom screen, select the Link icon > Link to Nintendo Account
- Log in to the Nintendo Account you created
- The account should now be linked