A lot of role playing in the 3DS top 10.
http://www.nintendoworldreport.com/news/44122/nintendo-sales-panic-january-2017-us-npd-group-results
A light January for Nintendo releases and supply issues caused a bit of a hardware slump in the January US sales survey issued by the NPD Group.
In hardware, supply constraints for the 3DS and the Wii U in the wake of the Switch announcement actually caused the NES Classic (itself supply constrained) to be the 3rd-best selling hardware of the month behind the PlayStation 4 and Xbox One. Preorder numbers for the Switch are not included in the NPD's report, as they will be rolled into the March sales survey expected in mid-late April.
On the software side, the big new release for Nintendo platforms was Dragon Quest VIII, which ended up as the 3rd best selling handheld title in January behind Pokémon Sun and Moon. Neither title, nor any other game on Nintendo systems, broached the top combined top 10 headed by Capcom's Resident Evil 7.
Wii U top 10 best sellers:
Handheld (3DS) top 10 best sellers:
I'm nervous that the Wii U isn't going to sell much anymore and then nobody is going to make games for it. I may have to replace it as my main console...