Wii Music? Total Sales Bust

While it never exactly resonated with the more discerning end of the video game buying public, the average man on the street would still have put a fiver on Wii Music doing well in its first month of sale (the game was released in the US on October 20). After all, it's for the Wii, it's made by Nintendo and it's got "Wii" in the title. Not to mention the fact it was the beneficiary of a fairly hefty marketing push from Nintendo. So heads were no doubt being scratched at Nintendo HQ when the game wasn't among the top ten sellers for October. And scratched further when it wasn't among the top twenty.

http://kotaku.com/5088081/wii-music-total-sales-bust

The fact that it's not very fun at all probably helped.