Metranne-132 is one of the three mechminds that spawns at the crash site, as soon as the player accepts the sixth mission from the main base in the Rock Sector. He won't revive, after bringing him to a base, which means that this mechmind can only be seen during this mission.
It is rather an object without data instead of a mechmind, because there are no details about this item, instead of weighting 50 kg. Bases will take the mechmind without giving any rating points, as it has no rating. It also doesn't belong to any clan, although Metranne-132 would fit to the name pattern of the Trances.