Rex is a Bernese Mountain Dog who debuted in Season 7 episode "Dino Rescue: Pups and the Lost Dino Eggs". He is a dinosaur expert that resides in a place called the Dino Wilds where the PAW Patrol travel to.
Rex lives in a place called the Dino Wilds, where there are dinosaurs, but no pups.
Rex has a very sweet personality, and is knowledgeable about dinosaurs. Due to his ability to speak to dinosaurs, he has quite a way with them. He has a soft spot for baby dinosaurs in particular.
Despite his disability, he is quite determined and doesn't let anything slow him down. If a dinosaur's in trouble, he'll do anything he can to save it, no questions asked.
Rex has black, brown, and light cream fur in patches. His eyebrows and eyes are brown. He wears a black and blue helmet, a lime-green vest, and a wheeled dino walker that carries his hind legs.
Rex's pup-tag is a blue 3-fingered dinosaur paw with a lime green background.
Rex’s vehicle is a blue and lime green car with stegosaurus plates on it. It even has the ability to lift up its wheels. In the back part, there is a ramp that allows Rex to get in and out easily. The vehicle number is 19.
Rex's Pup-pack contains a Dino Claw: it consists of a giant claw like a dinosaurs with a stretchable cable. This tool allows Rex to swing or climb to high places. With this, Rex can also grab heavy things like a log.
He can understand the speech of dinosaurs and serves as their translator.