Bemugan (ベムガン Bemugan) was the final monster used to try and take over the prehistoric world for its untouched fossil fuels.
Subtitle: Monster Bemugan (怪獣ベムガン Kaijū Bemugan)
Dinosaur Squadron Koseidon
- His head is remodeled from Piragia's head.
- Height: 2 m
- Weight: Unknown
- Origin: Space
- Powers and Weapons
- Electromagnetic Waves: Bemugan can fire electromagnetic waves from the two horns on his head.
- Iron Balls: Bemugan is equipped with chains with iron balls at the ends that he can use against his enemies.
|Dinosaur Squadron Koseidon Kaiju|
|Princess Altasia | Big Lagee | Futabasaurus | Pteranodon | Brontosaur | Nipponosaurus | Triceratops | Tyrannosaurus | Stegosaurus | Dimetrodon | Corythosaurus | Emperor Godmes | Alien Godmes | Commissioner Zaji | Leader Jericho | General Kesnochi | Shogun Gaban | Sigma-1 | Destron | Galias | Gomer Corps Commander | Gibra | Gibras | Killer Dinosaurs | Piragia | Kinokong | Magma Person | Grandon | Baribaa | Tyrannosaurus Jackie | Gaos | Eredon | Doctor Ogimura | Gigi | Dr. Sabata | S-1 | Alien Mosgis | Cyborg K2 | Alien Dakiron | Julie | Cosmo Plums | Cyborg B1 | Dr. Kuroiwa | Cyborg B2 | Cyborg Combatants | Dr. Kuramochi | Franken No.1 | Franken | Alien Devil Akumazy | Kishida Gounosuke | Tsumura | Cyborg Guardsmen | Doctor Dark | Phantom Shiraki | Alien Holosto | Nishiyama | Cyborg | Alien Yapu | Aliens | Ragout | Satar | Dr. Munakata | Professor Kisaragi | Bemgan | Kiska | Robot Weapon Nova|