So, I've been looking through the unobtainable Pokémon in SM so that I know who I should be looking out for in my playthrough of both Y and AS in a few months time to complete my entire National Living Dex, and found a few intriguing things when tabling Pokémon unobtainable from each region. Obviously, going into this, I expected both Hoenn and Kalos introduced Pokémon to be largely missing from the games due to their ominous inclusion in Gen VI(what being the region of exploration and all). Anyway,these are my findings:
Region Missing/Total (including event-only Pokémon) Missing/Total (excluding event-only Pokémon)* % of total (excluding event-only)
Kanto** | 54/151 | 53/150 | 35.3%
Johto | 54/100 | 53/99 | 53.5%
Hoenn | 94/135 | 93/134* | 69.4%
Sinnoh | 67/107 | 62/102 | 60.8%
Unova | 89/156 | 86/153 | 56.2%
Kalos | 56/72 | 53/69 | 76.8%
*Deoxys no longer counted as event-only due to its inclusion in the Delta Episode of ORAS
**Alola Form Pokémon used as proxies for their alternate forms
What should be taken away from this?
Well, as expected, Hoenn and Kalos introduced Pokémon have the largest portions of those introduced in that region missing. Kanto has a very, very low amount of Pokémon missing from its respective Dex, and Johto, Unova and Sinnoh are all almost equally apart. So, yes, of anything, I think that this could easily be misconstrued for use in an argument as to the possibility of Sinnoh remakes, especially when taken into account that out of the last three pairs of games, the Sinnoh starters took the longest to acquire, with Johto, Unova and Alola (obviously) starters being in SM - making the former two very unlikely for remakes - and Kanto, Hoenn and Kalos starters all being available very early into the Gen VI games.