Already on the vessel, hm? Now there's an idea! As it goes in many stories, sometimes your enemy hides in plain sight. If it's in the ship, it would have never needed to force its way in at all. Maybe it's been there all along... That would do away with explaining the lack of damage to the ship.

[Mettaton pauses a beat.]

Do we know what it looks like at all...? I've heard it must have been big.