There's generations on Pokemon? -_-;
Um..Yeah O_O
You know how the first 150 were red and blue, and then like, every 2 years since them, Nintendo had released identical versions of each game with new pokemon, so all the little 12 year old kids would waste their money on getting both versions because of a different legendary? xD
Blue/Green/red was 1st gen, Gold/Silver/Crystal was 2nd, Ruby/Sapphire/Emerald was 3rd, and Diamond.Pearl is 4th ._.
second was easily the most kick-ass gen, seeing as it had Crobat, Scizor, and Hitmontop O_O