>>45558989No seriously.
https://medium.com/@pankopop/the-xy-files-the-lost-plot-of-pokemons-6th-generation-d0d140881148The original concept for the Kalos storyline had the Fairy types coming from space, and being awakened in Pokemon who were descended from space. I would assume this was extrapolated from the myth that Clefairy came from space, and it would have been the reason that some Pokemon had the Fairy type added.