My favourite is Pokemon firered for the GBA mainly because that was it added content to the original game and was longer to and I loved the original 150 pokemon so thats why i liked pokemon firered

so whats yours????

I have to say, I really really enjoyed Soul Silver. Up until Soul Silver, Silver was my favorite. But the game was remade beautifully, with extras added. I logged quite a bit of time into it.

I always liked FireRed for some reason.
Although im not a really big pokemon fan.

It used to be Blue, but now it's Black. The new features and animations did it for me. Plus I like Garbodor.

I am going to happen to say "Green".... just kidding... I prefer HG/SS...

Pokemon Sapphire was the first Pokemon game I ever played, so that'll always be my fave.
Pokemon White is my 2nd fave, cus it's just a really awesome game.
Pokemon Heart Gold is my 3rd favorite cus of the 2 regions thang.

Blue would be my first choice, but I have to admit I loved Heartgold.

I love Pokemon games, but I'm not a huge fan of any one game in particular. I know that's bad. I've beaten most of them, but as far as how much time I spent playing it, Crystal is my "favorite". (I've had black since it has come out, but I haven't played in two months for some reason.)

Red, Blue and yellow, Mostly because the Nostalgia factor and the fact that they are STILL fun as hell to play.

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Either crystal or heartgold.
2nd gen will always be the best.