Back in Red, Blue and Yellow version there was a glitch you could take advantage of that allowed the player to pass the level 30 ghost without having to identify it using the Silph Scope by using a PokeDoll during the battle. In Firered and Leafgreen that glitch has been taken out so you will need the Silph Scope.
Yes.
You can beat a ghost type with another ghost type (Like Haunter)
have a strong collection of Pokemon (level 40s) and make sure you don't fight with a fighting type Pokemon or a ghost Pokemon as psychic is going to beat them pretty easily!
Types that are strong against Dusclops (ghost) are: Dark Ghost
I would choose a Dark or Ghost type
Yes.
Have ALOT of Water and Ghost Pokemon
Dark types beat ghost Pokemon, as do those of a higher level with the fire type.
You can beat a ghost type with another ghost type (Like Haunter)
Dark type can beat ghost.
Beat pokemon ghost tower and talk to mr. fuji at the top.
The Gym Leader is easy to beat. She mainly use's ghost type Pokemon. Ghost Pokemon are weak against Physic Pokemon. Trust me if i can beat her you can.
ghost
have a strong collection of Pokemon (level 40s) and make sure you don't fight with a fighting type Pokemon or a ghost Pokemon as psychic is going to beat them pretty easily!
Go to game corner in celadon city and press the button in the poster and a secret door will open! go there and beat Giovanni. then you will get silph scope and return back to Pokemon tower to beat ghost and save mr.fuji he will give you a pokeflute
you cannot beat a ghost in lavender tower because your pokemon are too scared to fight them, however if you unmask them you may battle and defeat them. to unmask then you need the silph scope, which you can get from team rocket hideout, after beating giovanni. and unmasked ghost may either be a ghastly, haunter, cubone or if it is the boss ghost, it is cubone's mother marowak.
Ghost and Psychic