You must go to celadon city, then you go to the game corner, and go to the man in front of the poster, talk to him, he will battle you. once he is defeated, press "a" in front of the poster, and stairs will appear. go down them, and into the rocket hideout. look up how get through it on gamefaqs.com. at the end, there is the leader, Giovanni, waiting to battle you. beat him, and obtain the silph scope. then, all Pokemon in the Pokemon tower will be visible.
Go west of Lavender town and go to the casino in the next town over. In the back, there will be a Team Rocket member in front of a poster. Defeat him, and press A in front of the poster. Then, go downstairs and beat everyone (you can go back up for pokemon center in between fights) and Giovanni drops the Silph Scope. Pick it up, and you can now fight / see ghosts.
There is an old lady's house in Pokemon FireRed that has some boxes you can get past. The only way to get past them is to use the E reader hardware device.
migrate the Pokemon from past game boy advanced games like emerald, firered, leafgreen, sapphire and ruby.
Go past mt moon go east and you will be in cerulean city.
You have to attain the Silph Scope to reveal the ghost. Kill it (LVL 30 Marowak) and then fight a series of Rocket grunts to get to Fuji, who gives you a pokeflute.
You have to go to Saffron City and get through Silph Co. After you get Team Rocket out, the president of Silph Co. will give you the Silph Scope. Go back and find the ghost. Its true identity will be unveiled, but I wont tell you who it is, and you can battle it. But beware- YOU CANNOT CATCH THIS POKÉMON! It is a waste of pokéballs to even try, and PLEASE don't waste your masterball on it, if you have it yet. I did that once... not fun to try and get through it with no masterball. So don't.
Either a poke doll or the silph scope you choose because you can cheat! Go to the top of Pokemon tower until you run into the marowak ghost if you don't have the silph scope use the poke doll you will cheat past it and you will be able to keep going up to get the pokeflute!
you need the pokeflut
get the pokeflute.
you go to celadon city into the game corner and there is someone from team rocket and after you get past him you pull the poster you go into the tr base. after you win you get the silph scope and you can fight the ghost.
beat it
There is an old lady's house in Pokemon FireRed that has some boxes you can get past. The only way to get past them is to use the E reader hardware device.
Beat it or run or catch it.
You can't. There's nothing beyond them so you can't get past them.
You must have the Silph Scope with you in order to identify them. The Silph Scope can be obtained at the Rocket Hideout (Game Corner in Celadon City) after having defeated Giovanni.
You must defeat them.
You have to defeat Koga or the Ghost tower, I think.
In Pewter City, past the Varidian Forest.