NSMBW sells over 500k units in its third week in Japan (1.9M LTD)

[DM235]

Great sales.

NSMB sold me on the DS. If I didn't have LBP, I would definitely be getting a Wii + NSMBWii.

What I don't understand is why LBP sales are nowhere near NSMBs sales. Platform marketshare does not account for this. Mario factor?