1.) Pokemon Y - 150:04
2.) Monster Hunter 4 Ultimate - 120:24
3.) Kingdom Hearts 3D: Dream Drop Distance - 117:27
4.) Pokemon Omega Ruby - 93:02
5.) Bravely Default - 81:49
6.) The Legend of Zelda: A Link Between Worlds - 80:56
7.) The Legend of Zelda: Ocarina of Time 3D - 76:39
[Nintendo eShop] - 63:39
[StreetPass Mii Plaza] - 58:26
8.) Resident Evil: The Mercenaries 3D - 52:40
9.) Monster Hunter 3 Ultimate - 50:22
[Internet Browser] - 47:12
10.) The Legend of Zelda: Spirit Tracks - 45:40
I was surprised to see that The Legend of Zelda: Majora's Mask 3D did not make it onto the list, however, I am sure that it will as I am planning on having a second playthrough before year's end.
I am surprised by how much I played Resident Evil: The Mercenaries 3D.
I am sure that more DS titles would have made it on this list had we accounted for my playtime on the DS as well.