Aegislash

Aegislash is a dual Ghost/Steel type Pokemon introduced in Generation VI. Even though Fighting type moves are strong against Steel, they don't affect Ghost types.

It evolves from Doublade when exposed to a Dusk Stone. It is the final form of Honedge.

Trivia

 * Despite being a Steel/Ghost type, Aegislash has one of the most immunities, with three (Normal, Fighting and Poison).