The Tyranno is one of the main antagonists of Genshi Shonen Ryu. It is a carnivorous one-eyed Tyrannosaurus that terrorized many lives during the prehistoric times, mercilessly destroying anything or anyone in its' path.
Tyranno is an brown, obese, one-eyed Tyrannosaurus Rex and has red eyes with yellow sclera.
For some the Tyranno is revered as a god, while many others feared it as a demon; it's terrible cry is enough to scare away any living being. Due to it's massive size and brute strength, the Tyranno is nearly impossible to defeat as no other living being was powerful enough to challenge it, making it the most dominant predator that roamed the prehistoric lands. The Tyranno lost it's eye during a confrontation with Kiba, who had been hunting the Tyranno endlessly ever since it killed his family and tribe.
- He is very similar to the Tyrannosaurus Rex from Age of the Great dinosaurs, only that he didn't lost both eyes and he's much smaller.
- His roars are reused from Gamera and Godzilla.