Some pokemon researchers think pokemon aren't from earth. In fact,
the Clefairies are sort of evidence of that. They dance around this
big evolution stone (called the moon stone) that crashed down from
outer space. Seymore, the pokemon expert who studies them, believes
pokemon came from the moon and someday they'll take humans up there,
too. Some pokemon fans seem to believe this too (I saw a story about
pokemon coming back for a stranded pikachu on the moon on another fan
fic page).
Anyway, remember who else the Japanese say comes from the moon? Hint:
she's a princess. Of course, one of the other popular characters on
this website, Sailor Moon!
So, this is how the lunar kingdom got pokemon from there to here, and
how they got all those evolution stones.
First of all, a little explaination: