This page describes Trypticon, the NPC Decepticon that transforms into a city.
Trypticon is incredibly powerful; the equal (and opposite) of the Autobot's Metroplex. He transforms between a three-mile tall Tyranosaur, a city-fortress, and a mobile battle station. At present Trypticon is located in New Pyongyang on semi-permanent guard duty and functions as an actual integrated part of the city.
During the Siege of New Pyongyang, Trypticon was grievously wounded during the first hour of the battle, causing his transformation systems to collapse and preventing him from attacking.