I'm sorry, Wickedish, but it seems that you have forget something: not all pokemon fans are able to buy the games.
I don't like to download the games, but I couldn't afford a Gameboy Advance and I'm putting effort to get a DS.
In some countries its very hard to buy things like that, 'cause it all comes from Europe, Japan or US and it costs two or three times the prize for someone who actually lives in Europe, Japan or US.
I don't feel comfortable with this, but its the only thing I can do, I love Pokemon, and I want to play it.
Besides, I don't think Nintendo is going to crush out just because some download the games... I mean, do you know that Pokemon is one of the best sellers franchises?
This is the same that occurs with movies and music. Sometimes you can't buy a cd, or you can't find a movie, so you download it. Sorry, I don't want to look rude, but I wouldn't believe you if you tell me that you have never downloaded a movie or some songs with Ares or eMule...