This has all made me think of something... what if what we're seeing with the Kalos Legendaries is a Pokemon version of the Panspermia theory?
https://en.m.wikipedia.org/wiki/Panspermia
With that said and everything, I came up with a theory: what if Xerneas, Yveltal, and Zygarde came to Poke-Earth via the Anistar Sundial in its original meteor form? And once they emerged from that Anistar meteor, they proceeded to create the life as we know it in the Pokemon world? And that very first Earth-based Pokemon they created was Mew, and of course it goes on from there.
well, technically that theory is true for pokemon. dialga, palkia & giratina are all from back in the beginning of the universe made by arceus as soon as soon as baby arceus hatched from its egg.
hell, giratina's about as alien as it get's. it doesn't even live in the same world until an mc catches it.
Cynthia said:
When this world was made, Dialga and Palkia appeared.Apparently, there was one more Pokémon that appeared at the same time.A Pokémon with as much power as Dialga and Palkia...But also one whose name was never to be spoken--Giratina!It's said to lurk in another world... A world on the opposite side of ours...
deoxy's was a space bacteria before it came into an existence as a pokemon
also, the lake guardians might have been made by the alien known as godarceus, but they where created after the planet was already in existence long enough for at a few humans & other pokemon to come into existence.
its possible that the lunar duo are extra dimensional beings born from dreams & nightmares.
elgyem & beheeyem are both outright based on aliens. most specifically grey & the pokedex entry for elgyem in WB2W2YAS is biased on the roswell incident to the point that it's inaccurate with the actual timeline
also the level of evolution is even a reference to the hitchhiker's guide to the galaxy.
plus, given how groundon, kyogre, rayquaza & heatran all came straight from the planet(groundon in the earth, kyogre from the water, rayquaza from the atmosphere & heatran from a volcano) it's highly possible that other beings might just get born from diffrent planets at random.
there's also the possibilty that the pokemon world itself has some kind of atribute that turns things into pokemon. i also go with that theory that humans in the pokemon world are themselves pokemon. it explains why some have aura powers while all humans are capable of becoming psychics
Sabrina said:
"Psychic power isn't something that only a few people have. Everyone has psychic power. People just don't realize it."
then we have the boy who turned into a kadabra & all yanmask's are dead human's carring around the face of when they where alive.
also the human's starting off as pokemon thing also explains why so many of the humans in the game look a like.