The dinosaur is a minor character in The Backyardigans.
The dinosaur is an archosaur living in the center of the Earth. When inventors Uniqua and Pablo find out that Tyrone the Lad's penny has fallen in front of the dinosaur, they are too afraid to go near it. They use their Extendo-Arm invention to retrieve the penny, but the dinosaur notices and runs after them. Tyrone notices that the dinosaur is friendly and plays "fetch" with it.
The dinosaur is mostly pale green. He has two white eyes with black pupils, as well as a long neck. His physical appearance is similar to that of Dragon.
The dinosaur has appeared in one episode of The Backyardigans: "To the Center of the Earth" from season two.