Fighting type and bug type are strong against dark type Pokémon.
Weak: Psychic Strong: Fighting
Sigilyph is weak against Rock, Ghost, Electric, Ice, and Dark type Pokemon.
Dark-Types are strong against Ghost-Types and Psychic-Types, but hold more of an advantage over the latter since Psychic-Type moves don't affect Dark-Types. Check out the related links for a chart showing all type advantages/disadvantages.
Dark is super effective against the Ghost- and Psychic-types.
Fighting type and bug type are strong against dark type Pokémon.
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.
Weak: Psychic Strong: Fighting
Psychic type moves are not effective against other Psychic types and Steel Types.
The pokemon that are strong against psychic are bug, dark, and ghost.
Dark, bug, and ghost.
The most effective type to use is Ghost, Bug, or Dark.
No. Fire-Types are strong against Grass-Types, Bug-Types, Ice-Types, and Steel-Types. Dark-Types are weak against Bug-Types and Fighting-Types.
Psychic is strong against Poison and Fighting, weak against Psychic and Steel, and has no effect on Dark. Bug, Dark, and Ghost are strong against Psychic. Psychic and Fighting are weak against it. There are no types that have zero effect on it.
Psychic Pokemon are strong against fighting and posion types, but they are weak against dark type. The best basic psychic Pokemon is Alakazam
Ghost-type Pokemon are strong against Psychic-types. This is because Ghost-type moves are super effective against Psychic types, giving them an advantage in battles. Additionally, Dark-type Pokemon are also strong against Psychic-types.