Ghost Train is a boss from Final Fantasy IV: The After Years. It is fought in the Depths of the True Moon. Like in Final Fantasy VI, it fights the party in a back attack. Unlike its appearance in Final Fantasy VI, this boss cannot be defeated with a Phoenix Down or the Raise spell.
The Ghost Train's most threatening move is its Wheel attack, which deals moderate damage to one party member. It counts as a physical attack, so stacking the Protect spell will decrease the damage. It will rarely cast Doom on one party member. The Ghost Train is not a fast attacker, so it will not be difficult to revive a party member if they are defeated, but the Slow spell is still effective. Ghost Train is classified as a machine and also as an undead enemy, however, it is not weak to Fire and Lightning magic, but it is weak to Holy.
Other than casting the Holy spell, it is recommended to equip weapons that have the Holy element. If the party has the Limit Ring, equipping it to the party's White Mage and using Curaja is also effective.
Ghost train refers to a phantom vehicle in the form of a locomotive or train.