Giga Khimaira (ギガキマイラ Giga Kimaira) is a Kaiju that appeared in the film, Great Decisive Battle! The Super 8 Ultra Brothers.

Subtitle: Ultimate Coalesence Monster (究極合体怪獣 Kyūkyoku Gattai Kaijū)


Great Decisive Battle! The Super 8 Ultra Brothers

With all of the monsters now destroyed by the Ultra Brothers, the combined number of Black Silhouette around the city summoned the souls of all five monsters and combined them into a towering monstrosity that was Giga Khimaira. Tiga, Dyna, and Gaia, being the only ultras around to fight, tried to battle the towering monster. However, the Giga Khimaira simply swatted away the Ultra trio and bombarded them with their fireballs. However, touched by the 3 ultra undying spirit to protect the ones they love, Hayata, Dan, Goh, and Hokuto, transformed into their respective Ultra forms: Ultraman, Ultraseven, Jack, and Ace. Shortly after releasing the imprisoned Ultraman Mebius. All 8 Ultra Brothers converged to battle Giga Khimaira as one. Unable to stop the 8 Ultras, Giga Khimaira fired its Disaster Burst at the group, only to have its ray reflected back at him, mortally wounding the monster. Outnumbered and weakened, Giga Khimaira tried to flea the planet but was futilely pursued by the Ultra Brothers and was weakened even further by Ultraseven's Eye Slugger. Finally, the 8 Ultra Brothers destroyed the monster by firing their signature beams simultaneously at the monster destroying it in a magnificent explosion in the Earth's atmosphere.


  • Originally, Giga Khimaira was completely different from what its current appearance is now. It was to be shaped like a centaur and composed of a different cast of monsters who were to appear in the film instead of the current cast. The monsters that were going to make up this Giga Khimaira were to be Vakishim, Twin Tail, Astromons, Tyrant, Monsarger, Eleking, Red King, and Gomora, and given the name Grand Tyrant (グランドタイラント Gurando Tairanto). It is be possible that the reason it was rejected was due to the combination being complicated.
  • Originally Giga Khimaira was not going to have its current name. Instead was to have the name Ultizaura (アルティザウラー Arutizaurā) but was given the name "Giga Khimaira" by the public as a name suggestion from Tsuburaya.
  • Due to Giga Khimaira's name confusion during pre-production, his name is never fully stated in the film.
  • Giga Khimaira's appearance is based on the Greek mythological monsters, the Chimera and Lernaean Hydra.
    • According to the original design, it was probably based on the Campe and Centaur, as it had a quadruped body but also arms.


  • Height: 512 m
  • Length: 738 m
  • Weight: 682,549 t
  • Origin: Yokohama
Powers and ​Weapons
  • Durability: Being a fusion of all five monsters Giga Khimaira can withstand many hits from the eight Ultramen's Ultra Beams and not even get a scratch.
  • Anti-Gravity Flight: The monster's body can fly effortlessly at high speeds without doing anything.
  • Disaster Burst (デザスタル・バースト Dezasutaru Bāsuto): Giga Khimaira's strongest attack, by combining the powers of every head, the monster can fire a giant heat ray from its chest, it is powerful enough to melt metal and dry up water in just seconds.
  • Monster Powers: Giga Khimaira is capable of unleashing each individual monster's powers via their heads.
    • Green Fireball: King Guesra's head can fire a green fireball from his mouth
    • Pandon Hell Magma (パンドン・ヘルマグマ Pandon Heru Maguma): The twin King Pandon heads fire massive fireballs.
    • Silver Destructor (シルバ・デストラクター Shiruba Desutorakutā): King Silvergon's head can fire blue fireballs from his mouth
    • Gold Destructor (ゴルド・デストラクター Gorudo Desutorakutā): King Goldras's head can fire dark redish fireballs from his mouth
    • Decadent Hell Laser (デカデント・ヘルレーザー Dekadento Heru Rēzā): From Super Alien Hipporito's head, the four, blue tentacle-like appendages that surround his body it can fire purple fireballs from them.
Original Giga Khimaira/Grand Tyrant
Giga Chimera 2

The original design for Giga Khimaira



Giga Khimaira, along with most of the king monsters, has gone up in value due to only being issued once.


Great Decisive Battle! The Super 8 Ultra Brothers


Ultraman Mebius Kaiju
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Ultraman Mebius Gaiden: Hikari Saga Arb | Bogar | Bemstar | Alien Babarue
Ultraman Mebius & the Ultra Brothers U-Killersaurus | Yapool |Alien Temperor | Alien Zarab | Alien Guts | Alien Nackle | U-Killersaurus Neo
Ultraman Mebius Gaiden: Armored Darkness Saramandora | Mukadender | Roberuga | Cherubim | Armored Darkness
Great Decisive Battle! The Super 8 Ultra Brothers King Guesra | King Pandon | King Silvergon | King Goldras | Super Alien Hipporito | Giga Khimaira | Black Silhouette
Ultraman Mebius Gaiden: Ghost Rebirth Mechazam | Inpelaizer | Alien Mefilas III | Grozam | Deathrem | Mebius Killer | EX Zetton | Ghost Rebirth
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