As for new types like I said before, NOTHING can convince me it's real except an official announcement. Anything else is just wishful thinking and trolling.
If I'm wrong then I'm wrong and i will accept that. I don't use my "instincts" when it comes to this topic, only cold hard facts. It will take more than wishful thinking and some rumors to prove that Fairy type is real.
But neither could anyone from the opposing side provide evidence as to proofing it as non-existing.
As I said, mods of both Smogon and Pokebeach now acknowledge who that person is, and acknowledge the source.
If you want to pull out the "official announcement" fact out,
well, it is a wise play-safe move when you don't know of any connections to insiders,
but equally the others as to wishful thinking despite people have a reliable source is not a good assumption neither. (If people have been here long enough to distinguish who is who.)
I personally am not one who wishes fairy type--
thinking that it exists does not equal to wanting it exist.
I do not see how fairy type could have benefited the Pokemon franchise.
(Though I do not hate it)
If I want to wish, I would wish for a plastic / polymer type. (Not for Sylveon though)
But back then, Pokemon Smash said that people won't be able to guess what Sylveon's type is.
So the probability of that type being a new type is very high.
But really, that new type is supposed to be called Yosei in Japanese,
whether it translates into Fairy or Pixie or faerie or whatever, is still subject to question.