Some information on Fairy Type Pokèmon taken from
Fairy-Types

"Researchers have been working tirelessly to gain further knowledge on Pokèmon classifications. Through their work, an amazing discovery has just been made. Fairy-type Pokèmon! Many Pokèmon have been reclassified as information on this elusive type has come to light. For example: Jigglypuff, Marill and Gardevoir are now dual-types, with Fairy-type included in their stats. In Kalos alone, you can spot Fairy-types like Flabèbè, Spritzee, Swirlix, Sylveon and even the legendary Pokèmon Xerneas. The most incredible part of this Pokèmon type revelation can be seen on the battlefield. Fairy-type attacks are especially effective on Dragon-types like Noivern, Salamence and Garchomp. Still many questions linger about this mysterious type. It's an important area of study and many Pokèmon scientists are looking to uncover more data on these enchanting and unusual Pokèmon."