Because Ghost Pokemon can't see in the dark.
Ghost-type Pokemon are weak against Ghost and Dark types.
they are weak against dark type Pokemon such as umbreon, or murkrow with moves such as bite or crunch
Ghost type is weak to Ghost type and Dark type moves.
Ghost types are weak against other Ghost type moves along with Dark type moves.
Dark and ghost. Yes, ghost is weak to itself.
Ghost-type Pokemon are weak against Ghost and Dark-type moves.
Ghost-type Pokemon are weak against Ghost and Dark types.
Ghost or other psychic Pokemon, depending on the Pokemon in question.
Ghost-type Pokemon are weak against Ghost and Dark-type moves.
Ghost Pokemon are weak to dark and maybe psychic Pokemon sorry the misspelled words
I belive it is ghost. ~ShayminSkyForm~
they are weak against dark type Pokemon such as umbreon, or murkrow with moves such as bite or crunch
Ghost type is weak to Ghost type and Dark type moves.
Ghost types are weak against other Ghost type moves along with Dark type moves.
Gothitelle is weak to Bug-, Ghost-, and Dark- types.
The three main Pokemon types that hold an advantage against psychic type Pokemon, are bug, ghost, and dark types. Ghost and Dark type Pokemon are usuallypreferredby trainers, usually due to their accuracy, and high critical moves, such as Night Slash. Odd enough, Dark type Pokemon are weak against bug types, while Ghosts are weak against Ghost and Dark types.
Psychic Pokemon, as well as in any other Pokemon game are weak to the types; Bug, Dark, and Ghost. However, Psychic has no effect at all on Dark Pokemon.