Mario Kart Wii apparently has outsold both console versions of GTA IV.

[amp316]

noname2200 said:
Don't start celebrating just yet. GTA IV is the Game of the Generation. Mario Kart Wii sold over a million on the Wii, so it is officially a Non-Game. Comparing their sales is therefore a comparison of apples and oranges. Ergo, GTA IV is still the best-selling game this generation.

 

This is true and brilliant logic.  Mario Kart Wii does not compete with games since it isn't a game.  What further supports the fact that it is a non-game is the fact that the name Wii is in the title.  Wii Sports, Wii Play, Wii Fit, Wii Music, Mario Kart Wii, and Wii Down My Leg are all non-games.