Bug, Dark, and ghost type moves will be super effective on a psychic-type Pokemon.
fighting and poison
Phycic pkm are super effective against fighting pkm. and flying larson
dark, bug, and ghost are all super effective against psychic type pokemon.
Psychic-type Pokemon are weak against Dark, Ghost, and Bug-type attacks.
Metagross is SUPER good,if you need him. He is Phycic and Steel type, so the only Super Effective attacks are:Water,Dark, Grass,And Fire. So if your going against a Poison type,Metagross is PERFECT fighting is okay,since a fighting is normally effective.
phycic types are affective to themselves or dark types ,dark types are the best!
Flying and Psychic are super effective against fighting
Lightning is super effective against water. I hope this helps.
Ghost & Flying. I believe that's it! Not dark or bug because although they're super-effective against Psychic, they are not-effective against Fighting. And not Psychic, because though it's super-effective against Fighting, it's not-effective against Psychic.
Water and Grass attacks are super effective against Onix.
psychic pokemons and attacks are super effective
super effective is bug
Bug Type and Fighting Type moves are super effective against it.