Much like Microsoft points, Nintendo has its own digital currency that they like to use to allow you to use to buy their games from the Nintendo eShop. Sony and Microsoft have both moved on to allow you to use actual money to buy their marketplace content, and now it looks like the company DLCsoft will be making an effort to make it easier on your pockets to download Nintendo games.
Soon you’ll be able to head to an independent retailer or mom and pop shop, and pick up a Nintendo eShop title like you would any other retail game. This includes retro titles, and titles that were exclusive to the Nintendo eShop. Hopefully with this, getting your fix for Mario becomes just a bit easier.