Quoted By:
Generation I: (Japan) Red/Green, Blue, Yellow; (international) Red/Blue, Yellow
Generation II: Gold/Silver, Crystal
Generation III: Ruby/Sapphire, FireRed/LeafGreen, Emerald
Generation IV: Diamond/Pearl, Platinum, HeartGold/SoulSilver
Generation V: Black/White, Black 2/White 2
Generation VI: X/Y, Omega Ruby/Alpha Sapphire, Zetta Emerald, Blaze Red/Vine Green (or vice-versa)
Generation VII: A/B or Plus/Minus (since they want to go back to the basics)