Tyrannosaurus Hexx is a fan story written by ArthurEngine.
Tommy, Lola, Perry, Gus and Krystal, along with Robotboy and Robotgirl, go to a museum. When Gus arrives at the dinosaur exhibits, he meets a T-Rex, who eventually reveals himself to be Felonious Hexx.
- The title is a pun on quite possibly the most famous dinosaur, Tyrannosaurus Rex.
- The first time Gus dies by being turned into a goose and eventually getting eaten by his parents.