Red/Green/Yellow are the 1st Gen games for GameBoy. Gold/Silver/Crystal are the 2nd Gen games for the Gameboy /color. Ruby/Sapphire/Emerald. If you mean like the main series games then the answer would be Pokemon Emerald. If you mean the spin-off games then I don't know. Nintendo's Gameboy has allowed millions to live their dream of becoming a Pokemon Master, check out the best Pokemon GBA games to.