How to redeem the code:
1. Select the Nintendo eShop icon on the Home menu.
2. Select Add Funds
3. Click on Redeem a Nintendo eShop Card
You can now choose between two different ways:
1. Enter the 16-digit activation code, then select OK
or
2. Select Scan QR Code
2.1 Scan the QR Code on the back of the Nintendo eShop card