Well... i love pokemon, but it seemed unfair that you have to buy "both" versions of the game just to catch all 150 pokemon (or how many are there now??)
i knew every secret, every turn, every hidden item in pokemon red, and being the hermit that i am i hated it that i couldnt get all pokemon, well, this haves more to do with the fact that i was always the rich kid with all the toys and my friends never owned a game boy, also, i bought the pokemon game for the "GB advanced" and i hated what they did with the series... "NOTHING"
ok ok, they added features but in the end, it was the same game all over, the graphics were cooler, but you still heard "8 bit" roars and grunts whenever you were fighting, i am not saying this is wrong, i am saying that it felt like the same game, and the new features didn´t appeal to me at all... still i caught as many pokemon as i could, but, i felt empty inside again because the game felt incomplete, there was a lot of potential in the game, but i felt they didn´t pulled it off
i dont know how are the new Pokemon games, but unless they have changed drastically the "base" of the story, i would not play them (oh and mistery dungeon was awfull in my opinion).