Home world: Pluto
First appearance: Ultraman Dyna episode 35: "Smile of Destruction Part 1" (1998)
Latest appearance: Ultraman Retsuden episode 26: "Osaka Great Decisive Battle! Defeat Neo Geomos!!"
Height: 56 m
Weight: 58,000 t
Category: Kaiju
Affiliation: Sphire
Roar(s): TBA

Geomos (ジオモス Jiomosu) is a kaiju that appeared in the TV series, Ultraman Dyna. He appeared in episode 35, and later transformed into Neo Geomos (ネオジオモス Neo Jiomosu).

  • Subtitle: Space Synthetic Beast (宇宙合成獣 Uchū Gōseijū)
  • Neo subtitle: Super Space Synthetic Beast (超宇宙合成獣 Chō Uchū Gōseijū)


Ultraman Dyna


After many years of development, TPC finally perfected the Cosmo Net. A system of satellites to monitor Earth, Moon, Mars, Jupiter, and Neptune all at once. During a reconnaissance test around the moons of Mars. A strange face was found this strange face was recovered and sent to Earth for analysis. However the artifact revealed to be none other than a piece of Sphire that attacked months before. Super GUTS had no choice but to release their cargo and crash land it far from Osaka (Rokko Mountains, to be exact) where the Sphire pieces are changed into Geomos. With Geomos emerging from the Earth, Super GUTS attacked with all the had only for the alien rock mutant to reflect their assaults with it's sound field. With Super GUTS unable to harm Geomos, Asuka transformed himself into Ultraman Dyna to do a battle between Geomos. Dyna was able to out maneuver Geomos's attacks until it's lightning managed to hit him. After Dyna went to his Miracle Type and use the Revolium Wave only for Geomos's trans-dimensional Barrier to neutralize it and continue his assault on the hero. Dyna quickly went back to his Flash Type and use the Solgent Ray twice only for a sound field to cancel out the first and Geomos's lightning to surpass the second and knock him down. Geomos finished the battle with Dyna by hitting him with enough force to send him over the horizon. Geomos burrowed underground while the humans are watching the battle begin to weep for the hero being defeated in a battle for the first time and leaving Japan in state of panic. An hour had not passed since Dyna's defeat when Geomos managed to burrow all the way to Osaka and started to wrecking havoc. Asuka managed to get Geomos's attention, but while the alien rock mutant started use his lightning, the Super GUTS member realized he had lost the Reflasher. With Asuka has knocked unconscious by an explosion from the lightning. Geomos continued his rampage even after Super GUTS was unable to use an electric barrier on it. Before Geomos leave Osaka, a tracker was fired on his back to prevent sudden attacks. However, little did Super GUTS know that deep beneath the ground Geomos had evolved into Neo Geomos.

Neo Geomos

Neo Geomos in promo

Neo Geomos in a promo

Neo Geomos is the evolved form of Geomos and is much more powerful than his pre-evolved form. With Geomos changing into Neo Geomos like a butterfly out of a cocoon, the alien rock mutant made it's way to the ocean where self defense force waited for it to emerge. It appeared as through Geomos emerged from the ground, but really it was it's old body that Neo Geomos changed form and used it as decoy. Neo Geomos emerged from the other side of the city and proved itself to be far more than the Super GUTS and the self defense force to handle. However, once Asuka was given back the Reflasher by a small boy and he transformed into Ultraman Dyna to fight the alien rock mutant once again. With the hero learning from the original's combat tactics, Dyna managed to out maneuver Neo Geomos even when the Solgent Ray was shrugged off. When caught by Neo Geomos's constricting tail, Dyna went into Strong Type and broke it's tail into several pieces before continuing his assault. Once Neo Geomos was in submittion, Dyna used his Garnate Bomber with an assault from Super GUTS to destroy it for good.

  • Geomos' episode serves as a tribute and homage to Gomora, with simmilar scenarios. Neo Geomos' electrifying tail is also a homage to Eleking, who also uses electricity and constriction.
  • Geomos is the first monster in Ultraman Dyna that manages to evade the Revolium Wave.





  • Height: 56 m
  • Weight: 58,000 t
  • Origin: Pluto


  • Claws: Geomos has large claws that allows him to quickly burrow and attack enemies.
  • Natural Strength: Geomos's natural strength is able to hit even Ultras over the horizon.
  • Lightning: Geomos has the ability to launch lightning from his back. These lightning strikes can stretch for a long distance and harm enemies.
  • Trans-dimensional Barrier: After absorbing the energy from the Neo Maxima Overdrive, Geomos can produce an indestructible trans-dimensional shield to block beam based attacks.

Neo Geomos
Neo Geomos

Neo Geomos


  • Height: 68 m
  • Weight: 79,000 t
  • Origin: Rokko


  • Fire Balls: Neo Geomos can fire fire balls from a gem a the top of his head.
  • Armor: Neo Geomos' thick armor in his skin can survive any attacks such like Ultraman Dyna's Solgent Beam.
  • Super Trans-dimensional Field: Neo Geomos has a stronger version of the original trans-dimensional field that can completely cancel out most beams attacks.
  • Lightning: Neo Geomos can fire a blue colored lightning from his body. It's more powerful than the original version.
  • Electrifying Tail: A claw-shaped club at the end of Neo Geomos' tail has the ability of electrifying opponents by touch.


Figure Release Information

Neo Geomos was released 3 times as a toy by Bandai in their Ultra Monster Series. Neo Geomos was first released in 1997 in conjunction with his episode in the Ultra Monster Series of that year. The figure has articulation in the arms, legs, tail (glue-sealed), and the tip of the tail (glue-sealed). The figure is labeled as number 120 in the series and is made of a dark brown vinyl with silver, metallic blue, mustard yellow, and metallic green (eyes) paint applied separately. The second version, made in the 2000 series, is the same, except it now has a tongue. Both versions have painted teeth, fortunately, and the 2000 version is labeled as number 31. Finally, Neo Geomos was re-released in the 2012 UMS as an EX figure in conjunction with his premier in Ultraman Retsuden. The toy uses the same mold, but in a lighter (soft) brown vinyl with more metallic paints that are lighter. The figure just slightly tips the 6-inch scale, so it scales perfectly well with other figures.

Ultraman Dyna Kaiju & Seijin
Ultraman Dyna Sphire | Darambia | Giralen | Neo Darambia | Cyclometra | Grossyna | Daigerun | Sildron | Forgas | Alien Dais | Gyabish | Bao-on | Giaguard | Zenekindarl people | Dexador | Alien Meranie | Monsarger | Mukkito | Himala | Alien Mijir | Garaon | Alien Nuaza | Alien spirits | Alien Krea | Gyanzar | Clone Sildron | Clone Silvergon | Neosaurus | Alien Shilback | Zombayu | Bishmel | Kokakucho | Alien Laseta | Sodom | Mozui | Diplas | Maricula | Spume | Reigubas | Digon | Left | Right | Demagorg | Grossyna II | Male Gigantes | Female Gigantes | Gaigareid | Kogaraon | Garaon II | Gregorl-Man | Imitation Ultraman Dyna | Monsarger II | Lovemos | Satan Lovemos | Alien Naltis | Menorfa | Bazob | Geomos | Neo Geomos | Yumenokatamari | Bundar | Zomborg | Zomborg Soldiers | Clone Daigerun | Alien Jagira | Jagira Tree | God Jagira | Diaorius | Alien Reguran Captain Zoyaka | Mountain Gulliver No. 5 | Golza II | Graikis | Torongar | Churasa | Moravia | Mejiwogu | Phantom Monster Army | Alien Fabiras | Devil Fabiras | Alien Chadabin | Mogedon | Neo Darambia II | Terranoid | Zelganoid | Neo Gaigareid | Gransphire
Ultraman Tiga & Ultraman Dyna: Warriors of the Star of Light Geranda | Alien Monera | Deathfacer | Queen Monera
Ultraman Dyna: The Return of Hanejiro Alien Mijir | Pudgy Garaon | Booska | Kamosuke | Casa Madara | Arwon | Alien Dehadoh (Mentioned) | Hanejiro | Alien Fabiras (Hologram) | Wanzetto