Like past games Pokemon Sun and Moon have a few exclusive Pokemon in each version.
I only have Moon right now so Turtonator Alolan Vulpix and Passimian will have to wait for now. It's nice how you can still catch the whole Rockruff line in both games though.
Pokemon website wrote:There are many Pokémon for you to encounter in your Pokémon Sun or Pokémon Moon game—but not every Pokémon will appear in both games! To obtain every Pokémon, you'll need to trade with other players. Take a look at the Pokémon known to appear only in either Pokémon Sun or Pokémon Moon. Pokémon Exclusive to Pokémon Sun:
Turtonator
Alolan Vulpix
Passimian
Pokémon Exclusive to Pokémon Moon:
Drampa
Alolan Sandshrew
Oranguru
Rockruff is a special Pokémon that can evolve into different forms depending on which game you're playing. However, you may be able to find both of its evolved forms in the wild. Search for them—both day and night!
I only have Moon right now so Turtonator Alolan Vulpix and Passimian will have to wait for now. It's nice how you can still catch the whole Rockruff line in both games though.