What is supereffective on spiritomb

Spiritomb is Dark and Ghost type. Under normal conditions, there are no moves that are super effective against it, since Ghosts cannot be hit by Fighting type moves.
However, if Foresight, Odor Sleuth etc. is used, the Fighting type becomes super effective.
Under normal conditions, Spiritomb is resistant to attacks of the Poison type, and completely unaffected by Normal, Fighting and Psychic type moves.