You go to the old chateu in eterna forest and go inside. . . you'll only find Gastly. It can be effective when trying to cath Azelf where if it uses uproar its harder to catch YW...
Haunter at level 25
You can get gastly at the Lost Tower or in the Eterna Forest
Ghastly,koli,jioa,salinia and gotyu
Yes. you can find ghastly at lost tower or Eterna Forest. You can get haunter but i don't know where.
I have herd ghastly is in the sprout tower
Ghastly will evolve at level 20.
Do you mean "Old Chateau"? If so, Ghastly, Haunter, Rotom (Post Elite Four for Diamond and Pearl, anytime for Platinum)
Ghastly can be found in Sprout Tower in Violet City.
bellsproute tower
the name is ghastly
ill tell you the Pokemon after the Pokemon you want hunter
You can usually find Pokemon like that in a cave.