Pokemon X Y: 4 million first 2 days!!

[Boutros]

Rogerioandrade said:

smbu2000 said:
In Japan, Pokemon X/Y sold 2,096,000 over 2 days along with 242,780 3DS systems according to Famitsu. http://s.famitsu.com/news/201310/16041735.html

Great numbers. It seems that the game sold well over the 4 million told by Nintendo. No way it sold less than 2 million in Americas and 1 million in Europe

How can it sell more than what Nintendo shipped?