"Additionally, the company also gave some insight into the lifetime total sales of other entries in the franchise. Pokemon Diamond and Pearl are the best performers, having sold 17.63 million units worldwide, following by Ruby and Sapphire with 16.22 million units, Black and White with 15.42 millions units, HeartGold and SoulSilver with 12.67 million units and FireRed and LeafGreen with 12 million units."

http://www.ign.com/articles/2013/10/15/pokemon-x-and-y-sales-figures-revealed

ruby and sapphire sold more than black and white. remakes confurmed