Ghost

Stats
HP (Overkill)	9,999 (4,060)
AP (Overkill)	1,450 (2,175)
Gil	810
Bribe	199,980 gil (Mega Phoenix x38)
Elements	Weak to Holy
Status Immunities	Death, Zombie, Petrification, Poison, Confuse, Berserk, Sleep, Darkness, Slow, Armor Break, Mental Break, and Provoke

Ghosts are fairly easy to defeat. They can cast Doom on your party members, which will instantly KO them after a certain amount of time, but other than that, they are not hard.

Kimahri can use Lancet on a Ghost to learn Doom for his Ronso Rage Overdrive.

Ability	Description
Sensor	“Casts Doom at the beginning of the battle.”
Scan	“Casts Doom at the beginning of the battle. Defeat it before the countdown runs out to avoid KO. Its elemental weaknesses change every battle. Kimahri can learn Doom.”

Steal:
Phoenix Down (common)
Farplane Shadow (rare)

Drops:
Mana Sphere

Location

You can find them anywhere inside the Cavern of the Stolen Fayth.