Is there a pokemon with this 3 requirements?

Question

1-dark 2-ghost 3-moves fast

Answer 1

The only Pokemon with the Dark/Ghost and Ghost/Dark typing are Sableye and Spiritomb both of which are slow.
Sableye does however get the Ability Prankster which gives the non attacking moves priority and Spiritomb gets Sucker Punch and Shadow Sneak both of which have priority.
But again, they are not fast.