Those who register a Nintendo Network ID on their 3DS, 3DS XL or 2DS will receive a digital code for a copy of Super Mario Bros. Deluxe until the end of January. While it may not be the greatest incentive to create a profile, it could benefit you in the long run. With a Nintendo Network ID, you can download free demos, software and more. Mario Deluxe packs in a lot of mini games and the full-length original making it pretty worthy of being free. Codes will be distributed to email addresses in February.