Barozi on 17 May 2013
This has nothing to do with the WiiU though.
It's from the NPD thread, so the 52% figure is US only and 3DS only.
Press release:
"Nintendo 3DS First-Party Software Sales Are Up 52 Percent in 2013"
http://www.joystiq.com/2013/05/16/nintendo-3ds-software-sales-up-52-year-on-year-in-us/
Luigi's Mansion 2 did really well though.
