Why is their a news piece about NSMB being fastest game to 15 million?

[Smashchu2]

KylieDog said:

Khuutra said:

Seece said:

I know The Source is a big fan of the Wii and not so much the HD, but MW2 is A game, and it reached 15 million in 8 weeks, much faster than NSMB

VGChartz lists games according to separate SKUs. It's the fastest single SKU to ever hit 15 million.

That's all there is.

The Pokemon games are not seperated.

NPD does seperate games. They also seperate ports.