Rhoga and Thudd are two bumbling dinosaurs who work with Ogthar in Dinotopa: Quest for the Ruby Sunstone.
Tired of picking up after other dinosaurs, Rhoga and Thudd abandon their job and search for treasure with the use of a map. During their search, they discover the Ruby Sunstone and unintentionally release Ogthar from his stone prison. Rhoga and Thudd are then enlisted by Ogthar to help him conquer Dinotopia at the promise of gaining riches for their services. Under orders of their new master, the two dinosaurs kidnap the dinosaur eggs from the Hatchery that are needed toform Ogthar's army and return to Ogthar's cavern, but are pursued by the protagonists along the way. During the final battle, Rhoga and Thudd chase after the heroes to get rid of them, but both are outsmarted and contained. It is unknown what happens to them afterwards, but it is assumed that they were eventually freed and punished for their crimes in assisting Ogthar in his evil plans.
Rhoga and Thudd are both greedy, bitter dinosaurs. While Rhoga is the brains of the duo, she lets Thudd do most of the grunt work. Thudd is Rhoga's dimwitted companion and makes up for his lack of intelligence with brawn.