You can pass the Ghost Tower in Pokémon Chlorophy Aster Town by following the steps below. You only need to find the Siruff Observation Mirror, detect the ghost's body, and find Old Man Fuji, and then you can successfully pass.
1. First come to Rainbow Town.
2. Enter the game hall and open the mechanism.
3. Then a staircase will appear, go down directly.
4. Defeat Team Rocket boss Banmu.
5. Get the Shiruf Observation Scope.
6. Then come to Ziyuan Town.
7. Enter the Pokémon Ghost Tower.
8. Entering the second level requires fighting against the powerful enemy Xiaomao.
9. Enter the third floor and start fighting the psychic master.
10. Then when you come to the stairs on the fourth floor, a dialogue will be triggered.
11. You will find a ghost.
12. Use the Shiruf Observation Mirror to see its true form, which is a Gala Gala. This creature cannot be conquered.
13. After defeating, enter the top floor and defeat the members of Team Rocket.
14. Then I met the old man Fuji
15. Send Old Man Fuji home to get a Pokémon flute.
