Diamond and Pearl are the most popular games of those you've listed, standing at over 103.4 million copies throughout last year. Although Black and White isn't that far off, with just under 89.8 million copies sold since the release date. Out of the others you've listed, Black and White 2 has sold as many as 78.3 million copies, Heart Gold Soul Silver haven't been that successful, with only 32.5 million sold. I got these all from different websites, mostly Yahoo answers. So yeah, hope I helped you, and guys, you might find different amounts, don't comment underneath saying that I'm wrong or whatever, this is just what I've found from looking at some websites, thanks :)
