Thread:Surviver.io/@comment-39782585-20200114043323/@comment-31984232-20200115161745

That seems right, regions are Kanto, Johto, Hoenn, Sinnoh, Unova, Kalos, Alola, and Galar (as of now)

Each one has games that take place in it:
 * Kanto:
 * Red, Blue/Green (depends on where you are), Yellow (gen 1)
 * Remakes: Fire Red, Leaf Green (gen 3)
 * Johto:
 * Gold, Silver, Crystal (gen 2)
 * Remakes: HeartGold, SoulSilver (gen 4)
 * Hoenn:
 * Ruby, Sapphire, Emerald (gen 3)
 * Remakes: Omega Ruby, Alpha Sapphire (gen 6)
 * Sinnoh:
 * Diamond, Pearl, Platinum (gen 4)
 * Remakes: N/A yet, suspected for Gen 8
 * Unova:
 * Black, White (gen 5)
 * Remakes: Black 2, White 2 (gen 5)
 * Kalos:
 * X, Y (gen 6)
 * Remakes: N/A
 * Alola:
 * Sun, Moon (gen 7)
 * Remakes: Ultra Sun, Ultra Moon (gen 7)
 * Galar:
 * Sword, Shield (gen 8)
 * Remakes: N/A (I mean, ^ are the newest mainline games atm so...)