Jonathan, an android butler engineered by Rex Owen’s parents, Dr. Ancient and Dr. Cretacia, was charged with safeguarding Rex during a time-travel mission. A critical malfunction inverted his head, triggering memory loss and erratic behavior in the first season. This led him to adopt chaotic yet humorous roles—airplane pilot, tour guide, chef, train conductor—often causing mishaps, though he delivered pivotal aid by supplying the D-Team with a book of Dinosaur and Move Cards.

Damaged while shielding the D-Team from a volcanic assault, he was restored by Reese Drake. An accidental adjustment to his head revived his memories, exposing his origins and Rex’s familial ties. Recollecting Seth’s data theft from his systems, he confronted the Alpha Gang, overpowered Spiny, and aided in recovering stolen intel. His unwavering loyalty to the Ancients and protective drive toward Rex defined his actions, even when conflicted—such as detaching from the Space Pirates’ ship to secure the Cosmos Stones.

In the second season, he operated the Backlander timeship, ferrying the D-Team and Alpha Gang across eras like Ancient Rome, the Caribbean, and Renaissance France to track the Cosmos Stones. Though less involved in core conflicts, his navigation enabled seamless transitions between story arcs. He endured crash landings, Gel Jark lightning strikes, and Spectral Space Pirate assaults. After repairs, he commandeered the Space Pirates’ vessel for a final temporal leap, ensuring key characters and dinosaurs returned to their timeline.

His capabilities included superhuman strength, agility, and resilience, surviving assaults like Fire Scorcher and Volcano Burst. Initially a comically unstable figure, post-repair iterations revealed a disciplined, mission-oriented persona. He balanced programmed obedience with autonomous decisions—defying directives to prioritize Rex’s safety. His design and nomenclature parodied Jurassic themes, aligning with the series’ mesozoic inspirations.