Subtitle: Huge Sword Dragon (巨大剣竜 Kyodai Ken Ryū)
- Height: 80 m
- Weight: 43,000 t
- Origin: Sanriku Peninsula
Stegorus was a type of Stegosaur that had become mutated by radiation but lived in peace in the depths of the sea. One day, Stegorus woke up to seek food. An Alien Meteor duo saw Stegorus and decided to mind control it by using two antennae that had were lodged into the monster's head. Stegorus, now mind-controlled, began to attack villages and bridges making him a no longer peaceful animal but a violent brute! Stegorus attacked the JMSDF with its flames. Then one of its targets was Daiskue riding the SAF plane and crash-landed forcing him to turn into Fireman to fight the Stegorus as the dinosaur's flames empowered him! Fireman got up and fought Stegorus. Fireman seemed to have the upper hand but Stegorus' tail choked Fireman and then Stegorus' electric plates left Fireman at a weakened stance! Ultimately at last chance Fireman used his Fire Cross to send Stegorus back into the sea for recovery.
For several days, Stegorus was asleep until the Alien Meteor controlled the stegosaur and woke Stegorus up. SAF set up missiles in case Stegorus was still hostile. As Daiskue had no idea where the last Alien Meteor was, he had no choice but to turn into Fireman to fight of Stegorus. Fireman got Stegorus in a headlock and chopped the mind control antennas off! On accident, SAF sent a radioactive nodule sent to the now peaceful Stegorus making the stegosaur get shot by the SAF missiles. Fireman protected Stegorus until the last Alien Meteor killed Stegorus. Fireman was saddened and left the Stegorus at the ocean. Fireman as Daiskue told the SAF captain not to interrupt the dead Stegorus' peace. The SAF team left a memorial for the peaceful dinosaur leaving Stegorus deep in their hearts.
A second Stegorus appeared and was killed by the monster Nerogiras, its head ripped from its body.
- Stegorus' whole existance in episode 2 was similar to the scenario with Toho's monster, Titanosaurus in Terror of Mechagodzilla.
- Stegorus is one of several dozen Stegosaur inspired monsters from Tsuburaya.
- Powers and Weapons
- Electric Plates: The plates on Stegorus' back can conduct electricity.
- Fire Breath: Stegorus can fire a deadly stream of flames from his mouth.
- Adept Swimmer: Being semi-aquatic, Stegorus can swim at moderate speeds.
- Deadly Tail: Stegorus is equipped with a tail deadly enough to choke Fireman.
|Fireman Kaiju & Seijin|
|Dorigorus | Dorigon | Stegorus | Alien Meteor | Jurasairous | Planet Gomerus | Spacer | Kinokurages | Twin Tail | Kumagorus | Nerogiras | Gudon | Stegorus II | Rodoguros | Alien Baranda | Baranda V | Scoradon | Alien Barogu | Tyrasaurus | Dorango | Alien Tran | Tyrannodon | Lanosaurus | Alien Velder | Tyrasaurus II | Long Neck | Alien Atla | King Zauras | Alien Sulpher | King Zauras II | MukuMuku | Makunosaurus | Gagango | Alien Gagango | Double God | Death Torosaurus | Alien Prima | Destrosaurous | Alien Green | Green Giller | Harmonigan | Alien Virenus | Gadorasaurus | Blacker | Black Satan | Alien Emusa | Bemutan | Devilsaurus | Bemusa King | Spegz | Speguzu Jr. | Dark Mander | Object X|