DinoCore

Once a pizza delivery boy, Rex chances upon the Dino Core and ends up becoming a Dino Master to protect the universe. With the help of Dino Master Baryon, Rex uses a 5-unit combination Ultra D-buster and defeats the Mecha Dino.

Rex is thrilled to have become a Dino Master, but is still only equipped with a 2-unit combination D-Buster. How can he hope to beat a powerful Mecha Dino like this?

Rex trains for a 5-unit combination, but just keeps goofing around. The members of the Dino Core aren't ready to trust Rex. With John's help Rex persuades Stego and succeeds with the 3-unit combination Mega D-Buster

Emily takes a shot at the 5-unit combination. Rex and Saber, who haven't been getting along, manage to make up with Emily's help and successfully achieve the 5-unit combination Ultra D-Buster.

Rex grows as a Dino Master, building the trust of the Dino Core members and successfully carries out a Core change.

Dark Angel Kaya emerges, intending to defeat Rex. She hides her true form and approaches Rex. Will Rex be able to escape this crisis?

Three thousand pizzas must be delivered. Everyone pitches in, singing while making all three thousand pizzas and successfully delivering them.

The Dinosaur Museum mascot Chu-Chu is a Tyrannosaurus robot. People are afraid of him, but he is a friend to Rex. They have to stop Kaya's plot, controlling Chu-Chu to attack Rex.

Tyranno, who had always felt left out, is entranced by Kaya's charm. But, on his own, he firmly resists, and Rex and his friends, who had been getting ready for Tyranno's surprise birthday party, show up to join forces and defeat Kaya.

Emily is kidnapped by Kaya, and Rex ventures into a perilous volcano to save her. Will Rex be able safely rescue Emily?

Kaya finally reveals her true form. Rex and his friends feel betrayed, having thought of Kaya as a friend only to discover that she's a villain, but Rex accepts her as a friend.

Darkno tries to make the volcano erupt. Dino Island is in danger, and Rex heads toward the volcano to protect the island but encounters a swarm of Mecha Dinos in his way.

Rex and Darkno finally face off. Rex is forced to his knees under the force of the powerful Darkno. Can Rex get up again to defeat Darkno?