T-Bone (voiced by Scott McNeil) - A Tyrannosaurus, and the team's leader who is usually attentive to the primary objective even where the others are distracted. His signature move, that he can perform alone or with any in the group, is the "Saurian Stomp" which shakes the local ground. T-Bone is light brown and wears black boots (wherein one of his claws protrudes through the right boot), dark green pants, and shoulder pads.
Stegz (voiced by Samuel Vincent) - A Stegosaurus who is the team's technological specialist and the most contemplative of the four. He can curl his body into a destructive saw blade, using the plates on his back as its cutting edge. Stegz is apple green and wears purple shorts and black boots.
Bullzeye (voiced by Jason Gray-Stanford) - A wise-cracking Pteranodon whose chief weapon is a shriek of ear-splitting frequency. Bullzeye is lazy and given to impulse buying. Bullzeye is maroon and wears yellow pants, black shoes (which his claws protrude through), and a gold necklace.
Spike (voiced by Cusse Mankuma) - A Triceratops with one broken horn who is the Extreme Dinosaurs' martial arts expert and the residential chef. Despite his eagerness to fight, he tends a garden in his free time. Spike is iceberg blue with a dark purple under his tail and wears brown shorts, brown leg bands, a yellow belt, and is always barefoot.
Hard Rock (voiced by Blu Mankuma) - An Ankylosaurus from an alternate reality inhabited by humanoid dinosaurs. After helping them against the Raptors, Hard Rock joined the Extreme Dinosaurs. He is the principal pacifist. Hard Rock is tan and wears red pants with grey boots.