 In order to capture ghosts, Luigi must first use his flashlight to light up the ghost and stun it, revealing their heart.When this happens, players use the Poltergust 3000 to suck them up, steadily reducing the ghost's hit points to zero; the more hit points, the more time it takes for a ghost to be captured, giving them a chance to break free while leaving Luigi more exposed to being harmed; if his HP is reduced to zero from being hurt by the ghosts, the game is over.Once a ghost's HP is reduced to zero, they are captured.