The Triceraton Empire is an empire that is inhabited by Triceratons, a race of Triceratops -like aliens. Triceratons breathe nitrogen and the oxygen in Earth's atmosphere can lead to delusions. The Triceraton Empire has been at war with the Kraang for some time, a conflict that has resulted in the destruction of the Triceraton homeworld through the Heart of Darkness (a black hole generator) and thus left the Triceratons obsessed with annihilating their enemies by any means necessary such as destroying any planet that the Kraang want to take over. In addition, the Triceratons had enemies in the Salamandrians. In the first half of the fourth season, they replace the Kraang and the Foot Clan as one of the main villains in the series. With the exception of Captain Mozar, all the Triceratons introduced so far have names that start with Z.