Both Super Mario 3D Land and Mario Kart 7 have become the fastest selling games in the history of their franchises in the US.
The pair are the first 3DS games to sell over a million units in the territory.
In addition, the 3DS console itself has officially sold more units in its first nine months on the market than the Wii sold in the same time period.
In total Nintendo sold 12m consoles in the US in 2011, which breaks down as follows – 4.5m+ Wii, 4m+ 3DS and over 3.4m DS.
That takes Wii's US user base to 39m and the DS to 51m. The Legend of Zelda: Skyward Sword has become the 45th Wii game to pass the 1m US sales mark.
"One of the strongest software line-ups in our history helped Nintendo have a great holiday season and to close 2011 with a full head of steam," NoA sales and marketing exec Scott Moffitt stated.
"Not only have the new Mario and Zelda titles already broken records, but with strong reviews and satisfied customers sharing their positive experiences, all three are also shaping up to be the latest long-tail titles from Nintendo.”