You can redeem your My Nintendo points for My Nintendo rewards. You can see available rewards and redeem points for them from your in-game menu.
❶ Select More.
❷ Select My Nintendo.
❸ Select the Rewards tab.
❹ Select a reward to redeem.
Note: Be aware that rewards may only be available for a limited time, may not be available in all countries, and may have a limit on the number of times they can be earned. See the My Nintendo Rewards Program Terms of Service for more details (https://accounts.nintendo.com/term_point).