How do I use Nintendo eShop Cards on my Nintendo 3DS system?

Applies to: New Nintendo 2DS XL, New Nintendo 3DS, New Nintendo 3DS XL, Nintendo 2DS, Nintendo 3DS, Nintendo 3DS XL

You can add funds to your Nintendo eShop account by accessing the Add Funds symbol on the Main Menu of the Nintendo eShop. Select Add funds using a Nintendo eShop Card option on your screen and follow the instructions. You will find the necessary 16-digit activation number by scratching off the silver panel at the back of the Nintendo eShop Card.

More about: Purchasing From Nintendo