It is a decently powerful enemy and has a powerful Lightning attack, but is especially susceptible to Sabin's Aura Cannon. Cyan and Shadow can assist by using Fang and Throwing Shuriken, respectively. The easiest way to defeat the Apparition is to have the Ghost accompanying the player use Possess on it, killing it instantly. Though the player will lose the Ghost as a party member, they are nearing the front of the train, at which point the Ghost will leave the party anyway.