9. Honedge
What is it: A sword Pokémon which is a Steel/Ghost type, from the new Kalos region for Pokémon X & Y. It is capable of learning Swords Dance, which seems a bit obvious and apparently unsheaths itself from its scabbard in battle.
Why it is creepy: Though no Pokédex entry has been revealed yet, some information has been given, stating that; "It comes into being when a departed spirit possesses a sword which once belonged to humans. Pokémon trainers who carelessly take this Pokémon in hand may find the blue cloth it holds wrapping itself around them and draining their energy." So not only does it contain the spirit of dead person/Pokémon, it also has a life energy sapping cloth to attack anyone who would foolishly mistake this sword Pokémon for a sword...