Talk:Crystal Ponies/@comment-99.177.117.29-20121111003608/@comment-3106212-20121111014534

Until I'm proven wrong, I'm assuming they are a fifth race.

(Alicorns, Earth Ponies, Pegasi, Unicorns, Crystal Ponies.)

Aside Sombra, who could be an exception and may not even be a Crystal Pony, they unanimously lack horns or wings.

Like so many other things in the show, it is left vague- so I guess its the realm of fannon now.