You use pokemon....
You need the Silph Scope to see it, then defeat it.
You can get a Master Ball at Silph Co. from the Silph Co. President after you beat Giovanni.
you need to find the silph scope this will reveal the ghost to be a marowak you can then defeat it
you defeat Pokemon trainer red and then he comes to silph co
The president of silph co gives it to you after beating team rocket.
Go to Saffaron City (which is being run by Team Rocket) and enter the Silph Co. building. Get through the building until you find the Silph Co President and the Team Rocket leader. Once you battle and defeat the leader, the President will thank you and you will receive the prototype of a new Pokeball: The Master Ball.
The ghosts can't be fought in their current forms. To beat them you have to see them and you can when you get a Silph Scope. You get the Silph Scope in Celadon City somewhere (No spoilers unless u want them)
Steven will appear in Silph Co. after you defeat Red at the top of Mt. Silver. He will be there to give you the Hoenn starter Pokemon. He will not be there before defeating Red.
go to rocket hideout in celadon city. find the silph scope and go to lavender town then you identify the ghost it will be a marowak defeat it then go up stairs save mr.fuji he will give you a pokeflute and then you can go inside silph. co building
you have to defeat team rocket at their secret base at the game corner and the boss drops it after you defeat him
First you must defeat him at the game corner and silph co then you must get 7 badges now Giovanni should be at the gym.
safron city