Nintendo Dominates 2000s - 9 out of 10 top selling games

It's worth pointing out that Wii Sports comes bundled with the Wii console. The vast majority of Wii owners have Wii sports; it didn't sell on its own. I don't know if you can buy it as a standalone title.

Wii Play was bundled with a second Wii controller. People wanting to play family games or have a spare controller bought Wii Play. Wii Fit comes bundled with the Wii's Balance Board. People who want to use the balance board will have a copy of Wii Fit.