Using Dark or Ghost type moves against it
You can beat a ghost type with another ghost type (Like Haunter)
Dark type can beat ghost.
ghost
thunder pokemon
The Gym Leader is easy to beat. She mainly use's ghost type Pokemon. Ghost Pokemon are weak against Physic Pokemon. Trust me if i can beat her you can.
Dark and ghost type moves.
I would choose a Dark or Ghost type
Dark types beat ghost Pokemon, as do those of a higher level with the fire type.
I'm afraid there are no types of pokemon that can beat the Ghost type :P
By using ghost and dark type moves, but be careful, if you use a ghost type, then your opponent will also have an advantage!
Ghost-type Pokemon are weak against Dark and Ghost-type attacks. Any type can damage a Ghost-type, except Normal and Fighting-type attacks.
Bug, Ghost or Dark.