Long before, dinosaurs on Earth disappeared due to asteroid collision. Dinosaurs came to life as small Tinysaurs on an island unknown. While some Tinysaurs like energetic Tricera, naughty Tyranno, sleepyhead Stego are having a great time, playing soccer with acorns, suspicious villains appear and start to threaten the peaceful island of Tinysaur… Where are these fishy stares coming from toward Tinysaurs? Will Tinysaurs be able to protect the endangered paradise, the Tinysaur lsland?

There is a strange feeling around Earth and Triforce just before the completion of the world's first mechanimal, Disc Cannon. Black Mirror who was thought to be dead, has revived and is seeking revenge. He turns all the mechanimals into Black Mechanimals and starts to destroy the world. The tamers start preparing for the final battle in the most dangerous of times...

Nachan and his friends were spending peaceful days when Dr.Franklin call out them to Triforce. Nachan, Isobel and Bandain undertake an important assignment, which is to educate new mechanimals born in the lab. Wing knight, Wing leo, High tero and Master leads four sacred mechanimals. They have to track and tame newer, stronger mechanimals. However Bandain challenge Nachan to an unexpected duel.