Grampusaurus is a minor character in Oobi.
Grampusaurus is a fictional dinosaur featured in a book written by Oobi. He is the grandfather of Umasaurus. At the end of the story, Grampusaurus bakes delicious brownies for his granddaughter and her friends, Oobi-Rex and Dino-Kako.
Grampusaurus is mostly light green and blue, with many blue spikes along his back. He has hazel eyes.
Grampusaurus has appeared in one episode of Oobi: "Dinosaur!"