"November set a new record for sales of Xbox One, and Xbox One was the best-selling console in the US and UK." - Microsoft
-"Cumulative PS4 & Xbox One sales are now almost 80 percent higher than the combined total of PS3 and Xbox 360 sales after 13 months..." - NPD
-"November was also a strong month for Nintendo on the console side, as sales of Wii U hardware and software increased by more than 10 percent and more than 90 percent, respectively, over the same period in 2013." - Nintendo
-The only thing Nintendo did not explicitly note as going up between their overall software and hardware was Nintendo 3DS hardware. Given they mentioned the Wii U going up by 10%, it's probably a safe bet that it's flat or down.
-"Sales of amiibo are approximately equal to sales of Super Smash Bros. for Wii U so far, while Link, Mario and Pikachu (in that order) have been the best-selling figures to date."