NAME ALL GHOST pokemon i only know 4

There are 27 Ghost-Type Pokemon so far
There are 9 pure type, 10 primary type and 8 second type

1. Gastly
2. Haunter
3. gengar
4. Misdreavus
5. Shedinja
6. Sableye
7. Shuppet
8. Banette
9. Duskull
10. Dusclops
11. Drifloon
12. Drifblim
13. Mismagius
14. Spiritbomb
15. Dusknoir
16. Froslass
17. Giratina (all forms)
18. Yamask
19. Cofagrigus
20. Frillish
21. Jellicent
22. Litwick
23. Lampent
24. Chandelure
25. Golett
26. Golurk
27. Rotom (Normal Form only)

Pure:

Misdreavus
Shuppet
Bannette
Duskull
Dusclops
Mismagius
Dusknoir
Yanmask
Confagrigus

Primary:

Gastly
Haunter
Gengar
Drifloon
Drifblim
Spiritomb
Giratina
Litwick
Lampent
Chandelure

Secondary:

Shedinja
Sableye
Froslass
Rotom (Normal)
Frillish
Jellicent
Golett
Golurk