What's the best selling exclusive in terms of First Week sales?

[Slownenberg]

MasonADC said:

BoseDK said:
Eh, Pokemon cheats with it's sales data anyway. they're two games really and their sales should be separate.
Most people I know who play Pokemon always buy both games. The actual player base for Pokemon is likely close to half of what the sales would suggest.

Obvious there is no official data that we can go on, but from what I see, only hardcore fans buy multiple versions. There is no way there is only 7-8 million Pokemon fans 

Yeah definitely most people don't buy both games, only the really hardcore fans do that. That's what trading is for. And I'm sure for those people who do buy both games many of them would be smart about it and just got buy a used copy after they've beaten the one they bought. Rather than the player base being half of what the sales suggest as BoseDK says it's probably like 90%+.