WII PLAY IS NOT BUNDLED!
The price difference between a Wiimote and Wii Play is $10 Aus
Yes, this is obvious, but bear with me
If a $10 game sell 13 million copies, and a $100 game sell 8 million copies, the $10 game is referred to as the 'best selling' of the 2, despite bringing in less revenue
This is just a basic definition, bear with me
Because Wii Play is only available with a Wiimote, the only way to think of it is as a $10 game only available if you buy a Wiimote
This is still obvious, wait a minute...
13 > 8
Sorry, still obvious
Therefore, Wii Play is the best selling Non Bundled game of the generation so far
Oh wait, I just proved you wrong
Halo 3 had a huge lead on SMG, which has been steadily diminishing thanks to the good ol Nintendo legs. SMG may overtake Halo 3 eventually