This article is manly taking about a little card called R4.  R4 can be used to download movies, video, and also pirated games.  I agree that its is affecting DS software sales.  I myself don’t do this, but I know a few people who do. Is it wrong? I am not here to do that, I will leave that up to you.

“Takings from Nintendo DS games in the US are lower than any other console and no doubt it will have a similar impact here. That’s the real danger — you may think you’re getting a good deal, but using the R4 is risking the future of the games industry,” Hillier concluded.