Quote Originally Posted by Chakramaster View Post
They don't always say so. In Explorers you're already in that world. So that's kinda not true in that sense. Others, yeah cause they state that, but Explorers you're already a part of that world. Unless they brought you into that world as a human to be a human that doesn't work. But it mentioned how you had always been in that darkness, so I'm pretty sure that's a no on other worlds.
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.