With Nintendo latest results it put the 3DS a few hundred thousand units away from outellsing the NES,so In a month or 2 it will have officially outsold it.
NES 61.91 M
https://mynintendonews.com/2016/10/26/mario-kart-8-has-sold-8-million-units-worldwide/
Nintendo’s current handheld the Nintendo 3DS has sold over 61.57 million units globally since launch. With regards to software Pokémon X & Y has sold 15.64 million. Mario Kart 7 has sold 13.94 million. Super Smash Bros for 3DS is the most recent best-seller, with 8.35 million copies sold.