Hardware sales for 3DS also see an uptick.
Super Smash Bros. for 3DS managed to sell over 705,000 copies in its first two days on North American shelves.
Despite launching on October 3, Super Smash Bros. for 3DS managed to push enough copies to become the fourth best-selling SKU in September's NPD sales chart. 135,000 of those copies were sold digitally through Nintendo's eShop, which accounts for over 19% of the sales.
The lead-up to the launch also saw a jump in 3DS hardware sales. Between the three different versions of the system, over 140,000 units were sold during the month of September, which is a 55% increase over August.