In the peaceful Light City, Gong-chan and friends find unidentified merchants selling mini dinosaurs in front of the school. They are the villains who they thought were gone, Piggyback-dan! Using a time cube that can travel through time, the dinosaurs of the dinosaur age are brought to you by making mini-dinosaurs, and then they make them huge and attack the earth!
- Created by
- Kim Ho-rak
- Origin
- KR