Step 1: Select “Nintendo eShop” on the HOME Menu to launch the Nintendo eShop.
Step 2: Select the account you want to use.
Step 3: Select “Enter Code” on the left side of the screen.
Step 4: Enter the 16-character download code. Any letters and symbols not used with prepaid codes (i.e. O, I, Z, commas, hyphens, etc.) will be disabled from the on-screen keyboard.
Step 5: Select “Send” to confirm. The game will begin downloading once the code is confirmed. The game icon will appear on the HOME menu, with a download status bar. The status bar will disappear once the game download is complete.