Well, honey, in Pokemon Red, you're gonna need a Pokemon with a strong Normal or Psychic-type move to take down those pesky ghosts in the Pokemon Tower. Just make sure your Pokemon is leveled up enough to handle those spooky specters and keep chipping away at their HP until they're gone for good. And remember, ghosts may say "be gone intruders," but with the right strategy, you'll have them saying "see ya later, alligator!"
Dark attacks. I suggest something common such as bite which a lot of the early pokemon can learn
Dark type can beat ghost.
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
Go to the casino in cetrulon city (i cant spell) go in the casino go to the team rocket member talk to him he will move press the poster and the corner will open up go to the top and beat giovanni once you beat him get the siph scope and go back to the ghost you can pass now
Ghost and dark type
Dark attacks. I suggest something common such as bite which a lot of the early pokemon can learn
Beat pokemon ghost tower and talk to mr. fuji at the top.
You can beat a ghost type with another ghost type (Like Haunter)
Dark type can beat ghost.
To get past the ghost, you need to get the silph scope. Or you could do it the easy way by getting a poke doll to make the ghost flee.
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.
beat the rockets in celadon (search the poster) and giovani will give you the silph scope, go to the Pokemon tower and use it
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
ghost
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.
beat it with a pokemon that has the advantage
Ghost and Psychic