Dunban67 on 08 January 2014
It looks like you are right re Wii U Party- aprox 900K sold at retail- the closest 3rd party is still Zombi U at 620k+/- (If you don t include Lego City published by Nintendo) at 670k+/-
Wii Party is selling alot in Japan but i don t here much about it here in the US-