Wii Fit was released in Japan in December 2007. Proved to be, despite its liberal use of the word "fit", a hit. So much so that it's now sold three million copies.
Yup. Three. Million. Which is up 200,000 from the last round of numbers we saw (gotta love those Christmas sales!)
Think Iwata & co give two hoots about the science of it all? Nope. They care about counting all that money.