The first generation constisted of Pokemon Red, Pokemon Blue, Pokemon Green (Japan), and Pokemon Yellow. The Secong generation of pokemon had Silver, Gold, and Crystal. The third generation has Sapphire, Ruby, and Emerald, and Generation Four has Diamond, Pearl, and Platinum. The first two generations have remakes for the newer systems, including Firered and LeafGreen for the Generation one remakes, and the soon-to-be-released Heartgold and Soulsilver for the Gen two remakes.
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