The Tricera Zord is the Bio Zord of Ethan, the Blue Dino Thunder Ranger. Tommy Oliver helped create it, possibly with Anton Mercer. It is unknown how Mesogog got a hold of it, but he used it to attack Reefside until Ethan was able to tame it. Now Ethan uses it to fight Mesogog’s giant sized monsters. The Tricera Zord can combine with the Ptera and Tyranno to form the Thundersaurus Megazord.