Going a little deeper into numbers
Nintendo released numbers for all the 3DS million sellers in US (I suppose these are retail + digital)
They also released some numbers back in August 2013 (those were retail + digital)
We can get how much some titles sold from September 2013 to July 2014 (11 months)
Luigi's Mansion 2 - 467,000
Animal Crossing: New Leaf - 621,000
New Super Mario Bros. 2 - 430,000
Mario Kart 7 - 640,000
Super Mario 3D Land - 230,000
Nintendo released numbers for all the 3DS million sellers in US (I suppose these are retail + digital)
Mario Kart 7: 3.48 million
Super Mario 3D Land: 3.09 million
New Super Mario Bros. 2: 2.28 million
Pokémon X: 2.10 million
Pokémon Y: 2.01 million
The Legend of Zelda: Ocarina of Time 3D: 1.39 million
Animal Crossing: New Leaf: 1.36 million
Luigis Mansion: Dark Moon: 1.33 million
The Legend of Zelda: A Link Between Worlds: 1.09 million
They also released some numbers back in August 2013 (those were retail + digital)
Nintendo 2013 3DS LTDs (Digital + Physical):
Luigi's Mansion: Dark Moon (863,000)
Animal Crossing: New Leaf (739,000)
New Super Mario Bros. 2 (406,000 in 2013, 1.85 million total)
Fire Emblem Awakening (390,000)
Mario Kart 7 (352,000 in 2013, 2.84 million total)
Pokemon Mystery Dungeon: Gates to Infinity (298,000)
Donkey Kong Country Returns 3D (268,000)
Super Mario 3D Land (265,000 in 2013, 2.86 million total)
LEGO City Undercover: The Chase Begins (264,000)
We can get how much some titles sold from September 2013 to July 2014 (11 months)
Luigi's Mansion 2 - 467,000
Animal Crossing: New Leaf - 621,000
New Super Mario Bros. 2 - 430,000
Mario Kart 7 - 640,000
Super Mario 3D Land - 230,000