Quote Originally Posted by Noblejanobii View Post
No no no, in the intro sequence of every game they welcome you to the world of Pokémon. Why welcome you if you’re from there already?

Plus I think grovyle mentions finding the hero one day and teaming up with them, implying you may not have always been from there.
Well it pretty much does that in every game. it could be as simple as play on words. Maybe, maybe not. Thing is, it was also stated that there were more humans than you in game too, but they were quite rare. So even if by that small chance you weren't one of those, there were more.