Pokémon X and Pokémon Y

I had no idea a Dullahan was a fairy. I only know it as a haunted, headless suit of armor.

I didn't know either until recently when this whole Fairy business began. It's one of my main arguments as to why I think Fairy type could end up having some really badass pokemon.
According to the classifications, the Dullahan is a type of Dark-inclined fairy. and it suggests that there is a light and dark divide between the different kinds of fairies. With the light ones being cute and innocent and playing with flowers (Sylveon and Furabebe bring this to mind) but there are also dark fairy creatures like the Dullahan.
It's quite interesting stuff to read really

Also Celty from Durarara!! is a Dullahan

 Spoiler