Absol is not part fairy
(Neither is Mega Absol)
Mewtwo does not require the special event Mewtwo to go Mega in either version
The description for Mega Mewtwo given does not match the one recently revealed
Neither Mega Mewtwo is part Fairy
The first Mega Mewtwo, the one talked about in reference to the trailer in the rumor, is also not X exclusive
Finally, by this point the Pokebeach rumors were very likely to be true across the board so a rumor adding in two mewtwos doesn't mean anything for that rumor.