Clay, the Brachiosaurus altithorax (played by Kevin Michael Richardson) . At 60 feet tall, and weighing over 50,000 lbs, he doesn't have many natural enemies. He does, however, have one particularily stubborn thorn in his side (or rather, on his back); a hypochondriacal, pantophobic Dryosaurus named Rhygel (played by Dana Snider), who clings to Clay for protection and support.
Clay: "Damn, son. You got legs, why don't you get off and walk?"
Rhygel: "Are you kidding? There are things out there that could eat me! Do you know what I am? An entree waiting to happen! I just know that the moment I touch ground, I'll be picked off by a f
ucking ceratosaur."
Clay: "All right, all right. Clill, Rhy. Don't go havin' a heart attack on me. You know, if you died up there, it's almost impossible to get your carcass off."
Rhygel: "Oh, thank you. Thank you very much for putting that in my mind. You know, I was just at my happy place, and you had to bring that up."
Navado: "You know, if you don't SHUT UP with the whole whiney Mort Goldman routine, I'll be the one who kills you!"
I am, regrettably, unable to design Rhygel until I find a good picture of a Dryosaurus skull. The internet is so huge, yet I've only found one.