Home world: Planet Earth; Koizumi Underground, near Tokyo
First appearance: Ultraman Dyna episode 6 "The Biggest Monster on Earth"
Latest appearance: Ultraman Dyna episode 46 "The power of Your Imagination"
Height: Varies
Weight: Varies
Category: Kaiju
Affiliation: Moravaia
Roar(s): TBA

Forgas (フォーガス Fōgasu), also known as Fohgas and Frogas is a kaiju that first appeared in the series Ultraman Dyna.

Subtitle: Mycelia Monster (菌糸怪獣 Kinshi Kaijin)


Ultraman Dyna

Generation I

An abnormally evolved specimen of a family of mushroom, the specimen, termed Forgas, evolved the capability of giving itself human forms, intelligence, and more. The creature waited until time was right and smashed its vines out from under the city of Koizumi and controlled the entire city via the tapping of the internet. Super GUTS immediately took notice and sent the GUTS Eagle with a crew of Asuka, Ryo, Kariya, and Nakajima to investigate the giant mushroom. After Asuka descended, he noticed a human shape in the crowd of buildings under the mushroom; that being Forgas's kaijin interface. Forgas quickly knocked the human out and dragged him to a building overcrowded with foul air and fungi. Forgas then explained that "The city you are standing on right now; it is me!"

Forgas then threatened to use the internet to force the TPC Europe base to launch its nuclear torpedoes at the TPC Japan headquarters, destroying it as a warning to humans. Then, Forgas planned to eliminate the human race and keep the Earth to himself. Asuka, being infuriated, attacked the kaijin, only for Forgas to vanish and carry out its plans. The giant mushroom then struck down the GUTS Eagle Beta, and the nuclear torpedoes have been launched. However, Koda, while in the Kolakerf NF-3000, destroyed 2 of the torpedoes and Ryo destroyed the third in the GUTS Eagle Gamma. As Asuka pursued Forgas out to the city, Forgas stated that he will destroy Ultraman Dyna before destroying humanity as he transformed into his monster state. Dyna appeared onto the scene and quickly destroyed the monster. However, a second form behind the giant's back and wrapped him around the neck with its tentacles. Dyna struggled as more formed behind his back. Finally, Dyna managed to destroy the tentacles and changed into Miracle-Type, whom then fled the scene to the air, and from a high vantage point, saw the true body of Forgas using Miracle-Type's vision. A "Shining Judge" attack hit the Forgas and destroyed the giant mushroom and its monsters. Forgas, seeing that all is lost, tried to flee into space but was hit by the Solgent Ray and destroyed.

  • The kaijin interface of Forgas uses a modified Alien Muzan suit.
  • Voice Actor: Junko Kawashima
  • Suit Actor:
    • Kaijin: Hiroshi Ishii
    • Monster: Koji Mimura.
  • Forgas is a term in British English that means "Poisonous Mushroom".

Generation II

Frogas II

Forgas reappeared as a member of the Phantom Monster Army. Forgas had a very minor role, which is scaring a man (who dislikes eating fungi) into a coma.


Forgas Mushroom


  • Height: Unknown
  • Weight: Unknown
  • Origin: Tokyo suburbs, underground Koizumi

Powers and Weapons

  • Growth: Forgas is able to grow itself to the size of a city, in the form of a giant mushroom.
  • Escape: Forgas's main cell can escape if his giant mushroom is destroyed.
  • Intelligence: Forgas is incredibly smart, having a brain size streching 10 kilometers.
  • Kaijin Interface: Forgas can create an interface of himself, while donning a tuxedo. Forgas can also exit the disguise as a vine through the right pant leg.
  • Technology Control: Forgas can easily tap into the internet and control technologies, making all weapons useless.
  • Monster Creation: Forgas can create monsters all around him, as he is as big as the city.

Forgas (Kaijin interface)
Frogas human


  • Height: 1.85 m
  • Weight: 60 kg
  • Origin: Forgas

Powers and Abilities

  • Vine: Forgas, appearing in its kaijin interface has a vine extruding from his left pantleg that is capable of grabbing.

Forgas (Kaiju interface)


  • Height: 56 m
  • Weight: 42,000 t
  • Origin: Forgas

Powers and Abilities

  • Tentacles: Forgas monsters can whip or ensnarl enemies with their tentacles.


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