Pokemon Eighth Generation Confirmation?

I meant to cover this earlier, but never got around to it. In Pokemon Sun the Pokedex entry for Yungoos is as follows, and I quote. "With its sharp fangs, it will bite anything. It did not originally live in Alola but was imported from another region." Now before you think that is nothing to get excited about, I'd like you to consider this. Yungoos debuted in Sun and Moon, which begs the following question. If Yungoos isn't native to Kanto, Johto, Hoenn, Sinnoh, Unova, Kalos, or Alola, then where IS it native to? I personally believe that this is akin to the Strange Souvenir the player can get in X and Y (which teased to Sun and Moon, because the person you get it from says their home land was none of the previous regions, and the Strange Souvenir can be bought and/or received through normal gameplay in Sun and Moon). So, I'm going to be looking forward to Generation 8 within the next couple of years.