Quoted By:
Kanto: FireRed/LeafGreen
Johto: HeartGold/SoulSilver
Hoenn: Omega Ruby & Alpha Sapphire
Sinnoh: Platinum (Though I'm 100% sure that BDSP will overpass them, the fact that they don't run on that shitty engine must make it better).
Unova: Black 2 / White 2
Kalos: XY
Alola: Ultra Sun / Ultra Moon
Galar: Sword/Shield + Isle of Armor & Crown Tundra