And every other magazine and method of sales reporting disagrees with Famitsu. By and large, they are counted as two games and NPD, etc. sales charts reflect that.
Here is what the "RuSa" advocates are trying to divert attention from: If there weren't two versions of every Pokemon title, they wouldn't sell as well. They might lose an almighty Nintendo sales trump card! Heaven no.
Two versions = inflated sales. A zippy abbreviation for the title doesn't change the fact that they are trying to have their cake and eat it too. Sales of both versions counted as one game, any argument to the counter spun away desperately, the unique nature of the Pokemon series downplayed.
Does anyone think that if Nintendo stopped making two versions of each Pokemon title and instead released just one version that sales wouldn't decrease? Even allowing that the unique monsters in some carts and link-up gameplay persisted, but there was just one package, one title, one set of box art.
That strikes to heart of the matter, and the answer is an undeniable yes, they would decrease. Gotta catch'em all.