can you confirm if he talked about this, with anyone?
"So I talked to Dan over twitter and using google translate, and this is what he told me:
Clefairy, Clefable, Jigglypuff, Wigglytuff, Audino, Chansey, Blissey, Snubbull, Granbull, Plusle, and Minun will be the only one's that will be retyped to Fairy, with Plusle/Minun being Fairy/Electric, and Snubbull/Granbull being Normal/Fairy. The other pokes I named will lose their normal typing for Fairy. Togetic will NOT be retyped to fairy, because it already has two types (Normal/Flying) and has a secondary egg group that would ruin its movepool-breeding with other pokes.
As for legends, The original Mew will also be retyped to Psychic/Fairy. Mewtwo will remain Psychic, but once you awaken it to its "Mewtwo X" form, it will become Psychic/Fairy just like the original Mew."
so far as I knew, it was just clefairy he specified, not any of these others