Monster X / Keizer Ghidorah

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Image gallery for Monster X

Monster X™ copyright icon name X II Copyright Icon Toho Company, Limited Monster
Monster X in Godzilla: Final Wars
Keizer Ghidorah in Godzilla: Final Wars
Monster X
Nicknames Monster-X,[1] Monster X II, Kaiser Ghidorah,
Kaizer Ghidorah[2]
Subtitle Monster X: Space Super Monster[3]
(宇宙超怪獣,   Uchū Chō Kaijū?)
Keizer Ghidorah: Giant Demon Beast[3]
(大魔獣,   Dai Ma-jū?),
Universe Strongest Monster
(宇宙最強怪獣,   Uchū Saikyō Kaijū?)[4]
Species Ghidorah
Height 120 meters[3][2][5] (Monster X)
140 meters[3][2][5](Keizer Ghidorah)
Wingspan 150 meters[3][2] (Keizer Ghidorah)
Weight 60,000 metric tons[2][5] (Monster X)
100,000 metric tons[2][5] (Keizer Ghidorah)
Forms Monster X, Keizer Ghidorah
Controlled by XiliensGFW
Allies Gigan, HedorahG:O, SpaceGodzillaG:O
Enemies Godzilla, Mothra, AnguirusG:O, RodanG:O, BattraG:O, KiryuG:O, KumongaG:O, TitanosaurusG:O
Created by Shogo Tomiyama, Ryuhei Kitamura, Katsuya Terada
Portrayed Motokuni Nakagawa (Monster X),
Puppet (Keizer Ghidorah)
First Appearance Godzilla: Final Wars
Monster X
Keizer Ghidorah
More Roars
Well now, let's enjoy the main event: the last chapter in the Godzilla saga! „ 

Controller of Planet X, before unleashing Monster X (Godzilla: Final Wars)

Monster X (モンスター,   Monsutā Ekkusu?) is a skeletal Ghidorah kaiju created by Toho that first appeared in the 2004 Godzilla film, Godzilla: Final Wars. Keizer Ghidorah (カイザーギドラ,   Kaizā Gidora?) is a transformation of Monster X, and also debuted in Godzilla: Final Wars.

The last and most powerful of the Xiliens' legion of monsters, Monster X arrived on Earth concealed inside the Gorath asteroid, which was shot down by Godzilla over Tokyo. Monster X initiated combat with Godzilla, and proved to be a considerably more challenging opponent than the rest of the Xiliens' monsters. Monster X was briefly joined by Gigan, but Mothra soon arrived and sacrficed herself to destroy Gigan, leaving only Monster X and Godzilla. When the Xilien Mothership self-destructed, Monster X transformed into the immensely powerful Keizer Ghidorah, which nearly killed Godzilla before the Gotengo intervened and gave Godzilla a surge of energy that allowed him to triumph over his extraterrestrial foe. Monster X was Godzilla's final opponent in the Millennium series, as well as his last onscreen foe for a period of 10 years and the final new kaiju introduced in a Toho film until the Servum.


It is possible that Monster X's name is a reference to "Monster Zero," an alias for King Ghidorah. The "X" in his name could come from the Xiliens' Japanese name, the "X Aliens."

Keizer Ghidorah's name comes from the German word "kaiser," meaning emperor, and "Ghidorah," coming from the immediate name of King Ghidorah's species.


Monster X is a bipedal creature with an exoskeleton-like armored skin. He possesses two small half-skulls on his shoulders and a long black forked tail. Monster X has red eyes, a skeletal face, and long spikes on the top of his head.

Keizer Ghidorah incorporates elements of both King Ghidorah and Desghidorah in his appearance. Like Desghidorah, Keizer Ghidorah is quadrupedal, and like King Ghidorah he has golden skin. Keizer Ghidorah has much smaller wings than the other Ghidorahs, and lacks defined scales on his skin, instead having smooth gold skin with bluish streaks and spikes erupting from multiple spots on his body. Keizer Ghidorah's middle neck is much longer than the other two, and each of his heads has a different arrangement of horns and spikes. Keizer Ghidorah also possesses two long, whip-like tails.


Unlike most of the Xiliens' other mind-controlled monsters, Monster X displays true malice in his battle with Godzilla, fighting viciously and relentlessly. He seems to take pleasure in causing Godzilla pain, such as when he breaks Godzilla's wrists and suspends him into the air and when he holds Godzilla still for Gigan to slice him with his chainsaws. Monster X's maliciousness is further demonstrated when he continues the battle even after Gigan and the Xiliens are defeated and any mind-control the Xiliens had over him is severed. After transforming into Keizer Ghidorah, Monster X blasts and beats Godzilla mercilessly across Tokyo, throwing him around with his gravity beams and kicking the weakened Godzilla in the head.


Monster X was summoned by the Xiliens from the Gorath asteroid, which has unknown origins. Keizer Ghidorah is a form of Monster X. It is unknown if the Xiliens themselves created Monster X or if he was simply discovered by them.

In the comic series Godzilla: Ongoing, Monster X's origins are equally cryptic. According to the Shobijin, Monster X is a creature who is "both of this world, and not of this world." Later comics establish that Monster X is likely of the same species as King Ghidorah, who is established to be a space-faring alien beast in Godzilla: Rulers of Earth.


Millennium Series

Godzilla: Final Wars

Monster X battling Godzilla in Godzilla: Final Wars

Monster X was summoned by the Controller of Planet X through the Gorath asteroid. Godzilla destroyed Gorath with his atomic breath in the skies over Tokyo, annihilating the city. Monster X then floated down behind Godzilla and attacked him. Monster X overpowered Godzilla in hand-to-hand combat until Godzilla retaliated, resulting in a stalemate between the two monsters. Eventually, the modified Gigan arrived to assist Monster X. Monster X held Godzilla still from behind while Gigan sliced his chest with his chainsaw hands. Mothra arrived and knocked Monster X and Gigan down, freeing Godzilla. Mothra and Gigan then fought and destroyed each other, leaving only Monster X and Godzilla. The monsters resumed their battle, with Godzilla gaining the upper hand and pinning Monster X to the ground, then proceeding to punch him rapidly. Godzilla tried to blast Monster X in the face with his atomic breath, but Monster X pushed his head away, causing the beam to strike the Xilien Mothership instead. After the Mothership self-destructed and the Xiliens were destroyed, Monster X and Godzilla engaged in a beam-lock, causing both monsters to be blown back. After this, Monster X transformed into Keizer Ghidorah.

Keizer Ghidorah
Keizer Ghidorah in Godzilla: Final Wars
Keizer Ghidorah (カイザーギドラ,   Kaizā Gidora?) is the second form of Monster X, which debuted in Godzilla: Final Wars. After his transformation, Keizer Ghidorah engaged in a beam lock with Godzilla, his gravity beams easily overpowering Godzilla's atomic breath. Keizer Ghidorah then repeatedly attacked the outmatched Godzilla with his gravity beams, tossing him across the ruins of Tokyo like a ragdoll. Eventually, Keizer Ghidorah approached the fallen Godzilla and kicked him repeatedly in the head before lifting him into the air and draining his energy through his bite. The crew of the Gotengo saw Godzilla losing his energy to Keizer Ghidorah, and Shinichi Ozaki used the ship's Maser Cannon to transfer some of his Keizer energy into Godzilla. Godzilla was immediately re-energized and released a shockwave of energy, breaking him free from Keizer Ghidorah's grip. Keizer Ghidorah tried to retaliate with his gravity beams, but Godzilla blasted off his middle head with his atomic breath and caused one of Keizer Ghidorah's gravity beams to sever another head. Godzilla then tossed the maimed Keizer Ghidorah over his shoulder by the beast's remaining neck. Finally, Godzilla threw Keizer Ghidorah into the air and blasted him with his red spiral ray, pushing Keizer Ghidorah into space and causing him to explode in the upper atmosphere.


Monster X's abilities include gravity beams from his three heads' eyes, rapid melee attacks, impressive agility, and transforming into the more powerful Keizer Ghidorah. He is also shown to levitate for a short period of time. Even before transforming, Monster X is still extremely powerful. He is a physical match for Godzilla and his gravity eye beams possess roughly the same strength as Godzilla's atomic breath. Monster X is also the only monster Godzilla fought in Godzilla: Final Wars that survived getting blasted by Godzilla's atomic breath at point-blank in the face, actually appearing to shrug the attack off, as well as the only one able to bring Godzilla to his knees and make him roar out in pain with just one attack.

Like King Ghidorah, Keizer Ghidorah is able to fire gravity beams from his mouths. These beams are stronger than Godzilla's thermonuclear breath. Keizer Ghidorah can also guide their paths and pick up and throw objects with them. Keizer Ghidorah can drain energy through his bite. In the comics, Keizer Ghidorah also has the ability to fly, which is never demonstrated in the film.


Video Games

Godzilla (PlayStation 3 / PlayStation 4)

Main articles: Godzilla (2014 video game)/Kaiju Guide#Monster X, Godzilla (2014 video game)/Kaiju Guide#Keizer Ghidorah.


Godzilla: Ongoing

name X as he appears in Godzilla: Ongoing
Monster X appears in the IDW comic Godzilla: Ongoing alongside SpaceGodzillaGigan and Hedorah. He first appears in issue 8 where he attacks New York before fighting Mothra. After his fight, he manages to dispatch her before Boxer, Harrison and Asuka Hikari arrive in Kiryu along with Kumonga. After dispatching Kumonga, Monster X engages in a brief fight with Kiryu before SpaceGodzilla and Godzilla show up. In the battle that follows, Monster X transmogrifies into Keizer Ghidorah where he starts to gain the upper hand over the King of the Monsters. However, Rodan soon arrives to assist Godzilla, managing to decapitate one of Keizer Ghidorah's heads by creating a sonic boom from his wings. Eventually with Rodan's help, Godzilla is able to overcome and kill Keizer Ghidorah.


Main article: Monster X/Gallery.


Monster X's roar appears to have been adapted from big cat growls and roars. As Keizer Ghidorah, his roar sounds like maniacal cackling, similar to King Ghidorah's characteristic cackling roar.

Monster X's roars
Keizer Ghidorah's roars


  • The name "Monster X" is also used to refer to Guilala and Jiger.
  • Monster X was briefly considered for Godzilla: Unleashed, but according to Simon Strange, he was "not interesting enough," and his transformation into Keizer Ghidorah would have been too complex.
  • Shunsuke Fujita wanted to include Monster X in Bandai Namco's 2014 Godzilla video game, but couldn't because of time constraints.
  • Keizer Ghidorah is the tallest main series Godzilla monster, along with the Heisei King Ghidorah and Mecha-King Ghidorah, at 140 meters.
  • Monster X's transformation into Keizer Ghidorah was kept secret by Toho prior to the release of Godzilla: Final Wars, in order to surprise fans. To further keep Keizer Ghidorah a secret, Toho trademarked it as "Monster X II" rather than under its true name.
  • The villain Blight from Justice League Dark heavily resembles Monster X.


This is a list of references for Monster X. These citations are used to identify the reliable sources on which this article is based. These references appear inside articles in the form of superscript numbers, which look like this: [1]

Era Icon - Toho.png
Era Icon - Millennium.png
Era Icon - Monster X.png
Era Icon - Keizer Ghidorah.png


Showing 6 comments. Remember to follow the civility guidelines when commenting.

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3 months ago
Score 0
It really annoys me how he's been scrapped from two different Godzilla games. Monster X is one of my favourite kaiju from the Godzilla films and all I want is for him to be a playable character in a Godzilla game. Its highly unlikely that he is gonna show up in another movie (who knows, maybe he'll appear in the anime trilogy?), so Monster X being in a game is the best I can hope for.


5 months ago
Score 1
Keizer Ghidorah's subtitle is pretty edgy, and his roars are pretty strange, but this doesn't detract from how awesome he is.


5 months ago
Score 1
He's kool and creative concept


5 months ago
Score 1
Keizer Ghidorah's subtitle is D̶̹͍̼̖̼͝͞E̥͉̕M̤̪̻͍̣̩̫O̥̲͙̝̭̭̠ͅͅN͓͔̪̻̺̱ͅ ̷̸̮͈̼͢ͅB̴̞̠̤̣͙E̴͎̰̹͕A͜͏͏̞͉S̨̠̼̫̫̼̘͈̕ͅͅŢ̹̮̟͓͙͚̫̰̀? Pretty edgy.

Kaiju khamodon54

6 months ago
Score 1
Keiser Ghidorah in his Monster X form looks much thinner and humanoid than Godzilla, yet he weighs a whole 5,000 tons more than him in the same film. Final Wars logic XD


11 months ago
Score 1
i find it funny he look like a grimm yet come out way before rwby was make.