i use rollout or some more effective thunder moves
You get a Pokemon that's effective against Phychic or Flying. Personally, I wouldn't defeat Lugia...
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.
Steel is super effective against rock type pokemon.
Rock, electric, ice, and psychic types are super effective against Crobat.
Lugia! Lugia's water type moves are super effective to ho-oh! Unfortunately, for some reason, Lugia isn't a water type!!! So ho-ohs fire type won't be not very effective, but Lugia's water moves will still be super effective if you use water moves
the moves that i have my lugia use are extrasensory,fly,aeroblast and hydro pump that way it is good even against grass type Pokemon which are super effective!
Lugia and Palkia are super effective
Lugia is a psychic/flying type. Despite being a legendary pokémon, it still has the normal weaknesses for this type. The weaknesses of Lugia are (super-effective against Lugia, 2x): Dark, Electric, Ghost, Ice and Rock. However, it is immune to Ground.
You get a Pokemon that's effective against Phychic or Flying. Personally, I wouldn't defeat Lugia...
Flying and Psychic are super effective against fighting
Lightning is super effective against Water and Flying types in Pokémon battles.
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.
super effective is bug
psychic pokemons and attacks are super effective
Bug Type and Fighting Type moves are super effective against it.