Normal types are strong against ghost types but at the same time they can't effect ghost types. Normal types have no strengths against any other type.
poison, electric, fire, rock, and steel
Yes. Ghost moves are super effective against Ghost type pokemon.
probably ghost type, rock type, or dark type. i also think water types effective
These Pokemon are weak to flying type moves and also phycic type moves. And also ghost type moves are not super effective but a fighting type move can't do damage to a ghost type Pokemon. Unless your opponent used forsight.
The pokemon that are strong against psychic are bug, dark, and ghost.
Ghost-Type moves are strong against Psychic-Types and other Ghost-Types. Ghost-Type Pokémon are strong against Poison-Types and Bug-Types, and particularly strong against Normal-Types and Fighting-Types, since they don't affect Ghost-Types.
Normal types are strong against ghost types but at the same time they can't effect ghost types. Normal types have no strengths against any other type.
Types that are strong against Dusclops (ghost) are: Dark Ghost
Dusclops is a pure Ghost-Type so both Dark type attacks and Ghost on Ghost are very effective.
Psychic type moves are not effective against other Psychic types and Steel Types.
Dark, bug, and ghost.
The most effective type to use is Ghost, Bug, or Dark.
A dark type is good against ghost and psychic types
light type does not exist, but if such Type were real it's highly likely that Light would be strong against Dark and Ghost and weak against Dark.
Hyper beam is a normal type move, normal type moves don't effect ghost types at all. In other words, Ghost types are strong against Hyper Beam.
When attacking, Ghost-Type Pokémon are strong against Psychic-Types and other Ghost-Types, weak against Dark-Types and Steel-Types, and useless against Normal-Types. When being attacked, Ghost-Type Pokémon are strong against Bug-Types and Poison-Types, weak against Dark-Types and other Ghost-Types, and invincible against Normal-Types and Fighting-Types (barring the use of a move like Foresight).