Subtitle: Freezing Monster (冷凍怪獣 Reitō Kaijū)
Guigass was a monster awoken from the effects of the comet Tsuifon as it passed the Earth. It awoke in the Arabis Mountains, emitting radio waves that could potentially detonate six missing nuclear bombs. Once the comet passed, the Science Patrol started a full search for the missing weapons and soon crossed paths with Guigass. As the team retreated, the monster Dorako flew in. They managed to lure Dorako to Guigass where the pair quickly engaged in combat.
As the titans waged war, a third contender burst forth from the rocks: Red King (who had swallowed the nuclear bombs). Red King challenged both Guigass and Dorako. The pair were no match for the deadly monster and Guigass was sent into full retreat, but the Science Patrol couldn't allow such a dangerous beast to exist. As Guigass crawled away, they unleashed their Extreme Drought Bomb, a bomb that destroys any signs of water on the object it touches, putting a sudden end to its life while Ultraman dealt with Red King.
- Guigass' suit is a heavily modified Hydra suit.
- Guigass' name is inspired by "Gigas," a term for giants in Greek Mythology.
- Guigass' roar is a reused Gabora roar. Which is also a reused King Kong roar.
- Guigass has the same subtitle as Lagoras, Margodon, and Peguila.
- Like Woo, Guigass was inspired by a Yeti.
- Although not physically seen Guigass is one of the monsters and aliens to make up Belyudra's right arm in Mega Monster Battle: Ultra Galaxy Legends The Movie.
Guigass suddenly appeared near an important observatory at the Izuhara Highlands. Haruki Natsukawa was sent to deal with it by piloting Sevenger. After a short brawl, Haruki unleashed Sevenger's newest weapon, the Rigid Core Iron Fist Rocket, to defeat Guigass, but had also crashed it into the observatory despite Captain Shota Hebikura telling him to be careful. After the battle, Director Kuriyama scolded the two of them again, saying that it is because of incidents like these that Windom's development could not be funded.
- Suit actor: Shun Takahashi
- A new suit was constructed for Guigass for its appearance. It is significantly more detailed than the Showa suit, and features several cosmetic differences.
- Height: 40 m
- Weight: 13,000 t
- Origin: Japan Alps (Ultraman), Izuhara Highlands (Z)
- Powers and Weapons
- Radio Waves: Guigass emits a radio wave frequency that is able to detonate bombs in its vicinity.
- Freezing Beam: The Kaiju Encyclopedia stated that Guigass could fire a freezing beam from his mouth. It was not used in the show, however.
|The Birth of Ultraman||Kanegon | Garamon | M1 | Red King | Alien Baltan | Antlar | Chandora|
|Ultraman||Bemular | Alien Baltan | Neronga | Ragon | Greenmons | Guesra | Antlar | Red King | Chandora | Magular | Suflan | Pigmon | Gabora | Jirahs | Gango | Mummy Man | Dodongo | Pestar | Gamakujira | Gavadon | Alien Baltan II | Bullton | Alien Zarab | Aboras | Banila | Hydra | Kemular | Underground People | Telesdon | Jamila | Gubila | Guigass | Dorako | Red King II | Suflan II | Gomora | Dada | Goldon | Woo | Keronia | Zumbolar | Alien Mefilas | Giant Member Fuji | Alien Baltan III | Kemur II | Alien Zarab II | Skydon | Seabozu | Zaragas | Re-Pigmon | Re-Dorako | Re-Telesdon | Geronimon | Kiyla | Saigo | Alien Zetton | Zetton|
|Ultraman Z Kaiju|
|Gomess | Sevenger | Genegarg | Bullton | Celebro | Neronga | Majappa | Bemstar | Segmeger | Windom | Guigass | Gomora | Telesdon | Erimaki-Telesdon | Peguila | Jugglus Juggler | Zeppandon | Gillvalis | Alien Pegassa Pega | Valis Raider | Skull Gomora | Thunder Killer | Pedanium Zetton | Alien Pitt | Tri-King | Five King | King Joe | Alien Barossa | Red King A & B | Giestron | Grigio Raiden | Kanegon | Greeza | Horoboros | Metsuboros | Pagos | Kemur | Baraba | M1 | Kelbim | Mother Kelbim | Ultroid Zero | Demaaga | King Guesra | Takkong|