Felonious Hexx is a recurring antagonist from Robotboy. He is Gus's archrival with magical powers. He started of as a simple magician until Gus kept embarrassing him during his show. After sending him to another world with his powers, he was defeated by Robotboy and Gus was freed. Since then, his career fell apart and he was forced to take medical classes for 6 weeks. After this he had jobs such as a school nurse and a dentist. He heavily blames Gus for his life of misery as it was his fault his career plummeted.