As of Generation 5 only the pokemon Spiritomb has no weakness because of the dual-type Ghost/Dark.
Bug, dark and ghost.
Ghost types are weak against other Ghost type moves along with Dark type moves.
Gastly is a ghost/ poison type, so any psychic or ghost type will be super effective against it.
Golurk is a Ground/Ghost-type Pokemon, so it's weak to Water, Grass, Ice, Dark, and Ghost attacks.
Ghost-type Pokemon are weak against Ghost and Dark-type moves.
As of Generation 5 only the pokemon Spiritomb has no weakness because of the dual-type Ghost/Dark.
Bug, dark and ghost.
guys i think pysic pokemons had weakness to normal type normal Pokemon have a weakness to physic Pokemon Kulmblach789 Pysic Poke have a weakness to dark ATks
Ghost types are weak against other Ghost type moves along with Dark type moves.
fire type is weak against palkia it is a water and dragon type Pokemon
Gastly is a ghost/ poison type, so any psychic or ghost type will be super effective against it.
Golurk is a Ground/Ghost-type Pokemon, so it's weak to Water, Grass, Ice, Dark, and Ghost attacks.
dark, bug, and ghost are all super effective against psychic type pokemon.
you will need either a bug type, ghost type, or a dark type to defeat or capture mewtwo.
Psychic-types are weak against Bug, Dark, and Ghost-type moves.
It's a Psychic-type Pokemon, so it's weak to Dark, Ghost, and Bug-type attacks.