The YouTube channel Game Theory stated that all games in the Pokémon series were connected regarding the same region, such as Black and White sharing the Unova region, including the sequels. The inter-dimensional theory makes sense, why else would there be two versions of almost the same thing happening? In Alpha Sapphire and Omega Ruby, you both get to choose your starter from the same 3 Pokémon, like X and Y both had Froakie, Fennekin, and Chespin, and Black and White had Snivy, Tepig, and Oshowatt. It seems to me that Game Theory has definitely proved that these things are what Nintendo had in mind, or maybe. The best evidence I can support this with is that all games are connected somehow, maybe it stretches beyond the two or more individual games to the shows, too. For instance, in the Black and White anime, Ash and his family take a trip to the Unova Region, further proving that all games exist between two different worlds, one where games like SoulSilver, Black, and X exist, and one where HeartGold, White, and Y exist. It's all taking place between two different dimensions, not where every single game in the franchise is it's own separate little dimension. Thanks for taking your time to read this, I sincerely appreciate it! 
~PokéGirl1124
~PokéGirl1124
