|King Ghidorah incarnations|
- Takehito Fujio: “King Ghidorah, who sunk in the ocean?”
- Kenichiro Terasawa: “Yeah, that's right. Could you revive him with technology from the 23rd century?”
- Emmy Kano: “Resuscitate him in the 23rd century, and then bring him back to the 20th century?”
- Miki Saegusa: “King Ghidorah's hurt very badly. Will he survive until the 23rd century?”
- Emmy Kano: “As long as his cells are still alive.”
- Hironori Mazaki: “It's possible, if preserved in low temperatures.”
- Emmy Kano: “Well?”
- M11: “Of course, I shall do it. I exist to do so.”
- ― Takehito Fujio, Kenichiro Terasawa, Emmy Kano, Miki Saegusa, Hironori Mazaki, and M11 discuss reviving King Ghidorah to fight Godzilla. (Godzilla vs. King Ghidorah)
Despite its name, Mecha-King Ghidorah is not a fully mechanical robot but a cyborg; it was built in the year 2204 around the comatose body of King Ghidorah after he was defeated by Godzilla in 1992. Mecha-King Ghidorah was sent back to 1992 to battle Godzilla in Tokyo before he could destroy Japan, and succeeded in halting his rampage and dumping him in the ocean, though it was destroyed in the battle. In Godzilla vs. Mechagodzilla II, the remains of Mecha-King Ghidorah's mechanical middle head were salvaged by G-Force, who reverse-engineered its technology in order to build Mechagodzilla.
Mecha-King Ghidorah's name is simply a combination of the word "mecha," which is derived from "mechanical," and "King Ghidorah." Mecha-King Ghidorah is never referred to by name in Godzilla vs. King Ghidorah, but his name is spoken during the opening narration of Godzilla vs. Mechagodzilla II. His name is sometimes abbreviated as Mecha-Ghidorah (メカギドラ. Japanese sources and merchandise sometimes offer different spellings of his English name. While the monster's official trademarked name includes a hyphen, it is spelled as Mecha KingGhidorah on the tag for the 1991 Mekagidora)Bandai The Godzilla Collection figure, and Mecha King Ghidorah on the tag of the 2018 Movie Monster Series figure. A Kaiyodo resin cast model kit of the character spells his Japanese name as メカ・キングギドラ with an interpunct, and offers the English name Mechanical King Ghidora. The Japanese spelling with an interpunct was also used in the trailer for Godzilla vs. King Ghidorah as well as a program for the 1994 exhibition Great Godzilla Expo. Godzilla.jp, Toho's former official Japanese site for the Godzilla series, misspelled Mecha-King Ghidorah's Japanese name as Mega-King Ghidorah (メガキングギドラ. Mega Kingu Gidora)
For Godzilla vs. King Ghidorah, Mecha-King Ghidorah, like the organic King Ghidorah, was designed by Shinji Nishikawa. Early concept art designs for both Mecha-King Ghidorah and the organic King Ghidorah depicted them with heads that closely resembled the heads of the Showa King Ghidorah. According to Nishikawa, the manes of hair on the heads were removed because it proved too difficult for the special effects staff to superimpose every individual hair over footage of people fleeing. The crescents atop Mecha-King Ghidorah's organic heads in some of the concept art were also omitted from the final design.
- Main article: Mecha-King Ghidorah/Gallery#Concept Art.
Mecha-King Ghidorah's costume was created from fiber-reinforced plastic, and weighed as much as 200 kilograms. As a result, the piano wire used to operate the costume often snapped during filming and the set was even sometimes damaged under the costume's weight. The Mecha-King Ghidorah suit was considered "too dangerous to put a person inside," and so it was operated without a suit actor. Whereas the organic King Ghidorah's suit took 16 piano wires to operate, Mecha-King Ghidorah required 18. A one-third scale miniature prop was also constructed to depict Mecha-King Ghidorah in flight. For the scene of Mecha-King Ghidorah flying over the Tokyo Metropolitan Government Building, the prop was hung from a crane and filmed on an open set.
The Mecha-King Ghidorah costume is prepared for the battle scene with Godzilla in Shinjuku.
Mecha-King Ghidorah's capture cables are attached to the Godzilla suit.
According to actress Anna Nakagawa, who played Emmy Kano in the film, the set for Mecha-King Ghidorah's cockpit utilized repainted and remodeled kitchen utensils such as drain strainers and pot lids. While specific switches were designated to operate the Godzilla capturing devices, Nakagawa was allowed to improvise which buttons to push to operate Mecha-King Ghidorah's beams.
Mecha-King Ghidorah resembles the purely organic King Ghidorah, but his middle head and neck, wings, chest, knees, and the tips of his tails are all replaced with mechanical parts. Mecha-King Ghidorah's cybernetic implants are all silver in color, except for the fronts of his wings, which are a dark gold color, and his mechanical middle head possesses green eyes.
In Godzilla Island, Mecha-King Ghidorah has three mechanical heads instead of one, and also has no gold coloring anywhere on his wings.
Mecha-King Ghidorah is completely under the control of Emmy Kano and M11, and as such does not act independently; he fights only to stop Godzilla. In Godzilla: Rulers of Earth, the Cryogs gain control over Mecha-King Ghidorah by severing his central head and replacing it with a mechanical one operated by the psychic commands of the human twins Minette and Mallory. However, the two organic heads retain some autonomy and eventually allow Mecha-King Ghidorah to break free of the aliens' control. Upon regaining his independence, Mecha-King Ghidorah immediately abandons the battle against Godzilla and Anguirus and flees to outer space, possibly in search of other members of his kind, according to Rhizon.
Mecha-King Ghidorah is the primary villain of the game Godzilla: Domination!, in which he is behind the disruptive energy waves emitted by the mysterious Meteor X, which allows him to control other monsters.
Mecha-King Ghidorah is the result of King Ghidorah being revived and cybernetically modified using advanced futuristic technology in the year 2204. As King Ghidorah's middle head and wings had been destroyed in his battle with Godzilla in 1992, they were replaced with cybernetic implants. Emmy Kano then took control of the monster and returned to 1992 to confront Godzilla in Tokyo.
In Godzilla: Rulers of Earth, Mecha-King Ghidorah is a weapon created by the Cryogs after discovering the comatose body of King Ghidorah. The aliens ordered Gigan to sever the monster's central head, then replaced it with a mechanical one in order to grant them control over the beast. The monster's damaged wings and other body parts were also replaced with cybernetic implants. The King Ghidorah who became Mecha-King Ghidorah is later implied to be a separate individual from the King Ghidorah who destroyed the Cryogs' home planet.
In Godzilla: Oblivion, Mecha-King Ghidorah is built by Dr. Eli Talbert and his assistant Ridley after King Ghidorah is rendered badly wounded by a nuclear explosion, in order to fight against Godzilla.
In Godzilla: Unleashed, Mecha-King Ghidorah is said to come from one possible future where King Ghidorah is defeated by an Earth Defender monster and is sent back to the present and converted into a cyborg by the Global Defense Force, explaining how he can co-exist at the same time with the organic King Ghidorah.
- Godzilla vs. King Ghidorah (1991)
- Godzilla vs. Mechagodzilla II (1993)
- Godzilla Island (TV 1997-1998) [19 episodes][note 4]
- Godzilla Final Wars (2004) [toy]
- Godziban (web 2019-) [episode 54; special episodes 10-11]
After Godzilla defeated King Ghidorah in Hokkaido, his body was plunged into the depths of the Sea of Okhotsk. With his opponent incapacitated, Godzilla began to wreak havoc throughout Japan unopposed. Emmy Kano, a Futurian who rebelled against her crew, and M11, her android, were asked if King Ghidorah could be revived in the 23rd century. If possible, he could be brought back to the present and used as an anti-Godzilla weapon to protect Japan. Emmy and M11 agreed and went to the future using the time machine KIDS.
As Godzilla continued his rampage through the center of Tokyo, Mecha-King Ghidorah materialized in a flash of pulsing energy. Piloted by Emmy and reinforced with several robotic segments and equipped with a potent armament of advanced weaponry, Mecha-King Ghidorah was more powerful than before. Mecha-King Ghidorah fired his gravity beams and triple laser beam at Godzilla, sending him crashing toward some buildings. Godzilla managed to regain his balance and damaged both of Mecha-King Ghidorah's wings. Emmy then fired Mecha-King Ghidorah's energy-conducting capture cables and released its machine hand restraint. Mecha-King Ghidorah lifted Godzilla into the sky and over the sea, but both were sent crashing into the waves when Godzilla fired his atomic breath directly into Mecha-King Ghidorah's chest, rendering the cyborg completely disabled. Emmy quickly escaped in KIDS, leaving both monsters trapped on the ocean floor. At first, it seemed as if M11's circuitry was still onboard the cyborg, but it turned out that he had been hastily rescued by Emmy before escaping in KIDS.
Meanwhile, beneath the surface of the sea, Godzilla fired his atomic breath and freed himself from Mecha-King Ghidorah's grasp and left it behind, ensuring he would return to menace Japan again.
After facing yet another defeat at the hands of the inhabitants of Godzilla Island, the evil Xilien Zagreth immediately realized it would take nothing short of a miracle if her plans for planetary conquest were to succeed. Luckily for her, that miracle soon arrived in the form of a giant object, the Monster Vending Machine, that gave her the choice of purchasing a monster. Her choice: Mecha-King Ghidorah, a cybernetic monster that she hoped would assist her in her invasion. She then sent the monster down to Godzilla Island, where it landed in front of Godzilla. However, several moments passed, and Mecha-King Ghidorah did not move. Soon it became apparent to Zagreth what must have happened: Mecha-King Ghidorah did not have a pilot, and would not work without either a pilot or modifications allowing it to work on its own. Godzilla then ventured forward and simply knocked the cyborg over, and very soon Beisuke Jinguji and Torema formulated a plan: use the robot to attack Zagreth's ship, the Vabaruda, in a full-frontal assault. The Commander soon took off in Mecha-King Ghidorah and Torema followed in her smaller ship, and the two attacked Zagreth. For some time, the plan worked, but unfortunately a rogue asteroid knocked both the Commander and Torema back towards Earth. Using a tractor beam, Zagreth brought Mecha-King Ghidorah back to her ship and soon flew it down personally to attack Godzilla Island. Fortunately, the monsters led an attack of their own, and soon drove the cyborg back into space.
Mecha-King Ghidorah would be called on again by Zagreth to attack Godzilla Island, but each time the beast would be forced to flee. Soon, her leader, the Giant Dark Emperor, began to tire of her constant losses and Zagreth was finally driven from Earth by Torema and was never to be seen again until Story 22 (Final Battle: Mecha-King Ghidorah Saga). Eventually, a more powerful version of Mecha-King Ghidorah called Hyper Mecha-King Ghidorah was purchased from the giant vending machine by Zagreth and sent to attack Godzilla Island.
To be added.
Mecha-King Ghidorah can fly at a speed of Mach 4 using anti-gravity generated by devices in the armor around his ankles. Because of this, his wings are not actually required for flight and instead serve as solar panels,:53 allowing him to fly even after his wings are badly damaged. Mecha-King Ghidorah prefers to attack by hovering overhead at a low speed and firing his weapons.
Gravity Beams and Laser Beam
Mecha-King Ghidorah can fire Gravity Beams (引力光線, or Plasma Gravity Beams Inryoku Kōsen) (プラズマ引力光線, from his organic left and right heads, while the mechanical central head fires a triple Laser Beam Purazuma Inryoku Kōsen) (レーザー光線, Rēzā Kōsen):15 from its Gravity Laser Cannon.[note 5] These triple laser beams shift in color from light bluish-white and light purple to red and green. In Godzilla Island, in which all of Mecha-King Ghidorah's heads are mechanical, he fires the triple laser beam from all three heads. In Godzilla: Domination!, his beams are replaced by fireballs. In Godzilla vs. the Robot Monsters, his organic heads fire red Gravity Beams.
A storyboard for Godzilla vs. King Ghidorah shows Mecha-King Ghidorah combining his rays into a single blast. The entry for Mecha-King Ghidorah in the video game Godzilla Movie Studio Tour seems to reference this, calling the attack a Triple Plasma Ray Beam.
Mecha-King Ghidorah's organic heads can deliver a surge of energy through their jaws, smoking Godzilla's hide. It is possible King Ghidorah may have also had this capability, but he never utilized it.
Godzilla Capture Devices and Machine Hand
Mecha-King Ghidorah is equipped with four electrified capture cables, called Godzilla Capture Devices (ゴジラ捕獲装置, and a large Machine Hand Gojira Hokaku Sōchi) (マシンハンド Mashin Hando):52 which he can use to restrain Godzilla. These are strong enough for Mecha-King Ghidorah to be able to fly over large distances with Godzilla in tow, as seen in both Godzilla vs. King Ghidorah and Godzilla: Rulers of Earth.
With the time machine KIDS built into him and serving as his escape pod, Mecha-King Ghidorah is able to perform independent Time Warps (タイムワープ, allowing him to arrive in the year Taimu Wāpu)1992 from 2204. If the cyborg is badly damaged, KIDS is able to launch from him, carrying pilot Emmy Kano and M11's A.I. inside.
In the Atari and Pipeworks games, Mecha-King Ghidorah can generate an energy shield which either converts enemy energy-based attacks into health or reflects beam attacks away from him.
Seen only in Godzilla: Save the Earth; when active, this ability gives Mecha-King Ghidorah complete invincibility. Along with this, all energy-costing attacks cost no energy and all melee hits taken damage the aggressor instead.
In the 1993 arcade game Godzilla, Mecha-King Ghidorah has the ability to instantaneously teleport.
In the 2023 IDW Publishing comic Godzilla: Monsters & Protectors - Summer Smash, Mecha-King Ghidorah fires green eye lasers from his central head at Jet Jaguar, causing the robot to temporarily return to human size.
Mecha-King Ghidorah is very large and slow-moving, with some delay experienced between commands given by Emmy and the cyborg's actions. As such, he is outmatched by Godzilla at close range and is better suited to attacking by hovering from a distance. If Mecha-King Ghidorah's cockpit is hit, Emmy may be susceptible to harm and is, at one point, knocked unconscious. Mecha-King Ghidorah's cybernetics are vulnerable to Godzilla's atomic breath, with repeated blasts dealing severe damage to the cyborg's mechanical parts and a final focused blast to the chest putting him out of commission. Mecha-King Ghidorah is forced to retreat in Godzilla: Rulers of Earth after Godzilla uses Anguirus as a flail to strike him directly in the chest.
In Godzilla: Rulers of Earth, Mecha-King Ghidorah's organic heads can override control from the mechanical central head, allowing him to break free of Minette and Mallory's psychic control and abandon the Cryogs.
- Godzilla, King of the Monsters (1993) - Nintendo Game Boy
- Super Godzilla (1993) - Super Nintendo Entertainment System / Super Famicom
- Godzilla (1993) - NEC/Hudson Soft TurboDuo / PC Engine Duo
- Godzilla (1993) - arcade
- Godzilla (1993) - NEC PC-9801
- Godzilla: Giant Monster March (1995) - Sega Game Gear
- Godzilla Movie Studio Tour (1996) - PC and Mac
- Godzilla: Trading Battle (1998) - Sony PlayStation
- Mothra: Dream Battle (1998) - Sega Dreamcast VMU
- Godzilla: Destroy All Monsters Melee (2002) - Nintendo GameCube and Microsoft Xbox
- Godzilla: Domination! (2002) - Nintendo Game Boy Advance
- Godzilla: Save the Earth (2004) - Sony PlayStation 2 and Microsoft Xbox
- Godzilla: Unleashed (2007) - Nintendo Wii and Sony PlayStation 2
- Godzilla Unleashed: Double Smash (2007) - Nintendo DS
- Monster Strike (2013) - Android and iOS
- Godzilla Kaiju Collection (2015) - Android and iOS
- Godzilla (2015) - Sony PlayStation 4
- CR True King of the Monsters Godzilla (2018) - Pachinko
- Godzilla Defense Force (2019) - Android and iOS
- Godzilla Battle Line (2021; added in 2022) - Android, iOS, and PC
- Boku & Dragons (2015; added in 2022) - Android and iOS
- Pachinko True King of the Monsters Godzilla 2 (2022) - pachinko
- XR World (2022) - Android, iOS, and PC
Mecha-King Ghidorah appears as the penultimate boss in the 1993 video game Super Godzilla for the Super Nintendo Entertainment System. In this game, Mecha-King Ghidorah is the result of alien invaders cybernetically reviving King Ghidorah following his earlier battle with Godzilla and sending him back into battle. Mecha-King Ghidorah can be fought with either Godzilla or his more powerful form, Super Godzilla.
Mecha-King Ghidorah appears as the unplayable final boss in Godzilla: Domination!, where he is fought on the final stage, Meteor X. In this game, Mecha-King Ghidorah is significantly enlarged, standing several times taller than the playable monsters and taking up nearly half of the stage. Mecha-King Ghidorah doesn't move around, but will occasionally jump, damaging the player unless they jump as well. The only way to damage Mecha-King Ghidorah is to hit his robotic head, then hit the flashing point on his body after he is stunned. Mecha-King Ghidorah mostly attacks by breathing fireballs or firing energy blasts. When he takes enough damage, one of his organic heads will die and vanish, which results in health and energy power-ups being spawned. After Mecha-King Ghidorah is damaged enough, his second organic head will be destroyed, leaving only his robotic head. Mecha-King Ghidorah's robotic head will move incredibly quickly, making it difficult to hit, while using an attack that launches a spread of fireballs. When Mecha-King Ghidorah is finally defeated, his robotic head will explode, followed by his entire body, engulfing the screen in a white flash.
Mecha-King Ghidorah returns in Godzilla: Save the Earth. He plays similar to King Ghidorah, meaning he is powerful, slow, can fly, has a large amount of health, and has most of the some moves with some changes and different resistances. He does have two extra abilities, however. The first is that he has a taser attack that, if it connects, paralyzes his opponent and quickly drains away their energy. The taser can only be used three times, but collecting energy power-ups allows it to be used again. The other is that his block is an energy shield, which uses energy, and will absorb a weapon attack and convert it into his own health. Although he had the same rage attack as King Ghidorah in Destroy All Monster Melee (flying into the air while spinning around and firing all three gravity beams), in Godzilla: Save the Earth he now becomes temporarily invincible and any opponent that touches him is knocked away.
"Mecha-King Ghidorah is the GDF's best attempts to use the weapons of the Vortaak to defend Earth, rather than destroy it. After King Ghidorah's defeat at the hands of an Earth Defender in one possible future, the alien monster was rebuilt with GDF technology to serve the interest of mankind. To replace King Ghidorah's natural body armor, destroyed in the re-animation process, this new incarnation has been outfitted with a powerful energy shield to reflect weapon attacks. In addition, Mecha-King Ghidorah has replenishable taser weapons, which can drain an opponent's energy reserves. With most of his original form's combat techniques intact, Mecha-King Ghidorah might stand as humanity's best hope against the Vortaak invasion."
Mecha-King Ghidorah appears as a playable monster exclusively in the PlayStation 4 version of the game. Mecha-King Ghidorah has the ability to fly and fire gravity beams like King Ghidorah, but also possesses the Machine Hand from Godzilla vs. King Ghidorah. When playing as Mecha-King Ghidorah in God of Destruction Mode, the player will need to defend cities from attacking kaiju, and prevent a certain percentage of the city from being destroyed.
- One tap: Pincer Bite
- Two taps: Three Headed Bite
- One tap (Mid-air): Bite Kick
- Tap: Three Headed Attack
- Forward + Tap: Machine Hand
- Tap (Mid-air): Rotation Attack
- Tap: Jump
- Hold: Flight
- Tap (Mid-air): Land
- Tap: Gravity Beam + Laser Beam
- Roar + Tap: Triple Tornado
- Tap: Windstorm
- Main article: Godzilla (2014 video game)/Kaiju Guide#Mecha-King Ghidorah.
Mecha-King Ghidorah in the Godzilla arcade game
Mecha-King Ghidorah's card from Godzilla: Trading Battle
Mecha-King Ghidorah in Godzilla: Domination!
Mecha-King Ghidorah's battle sprite in Godzilla: Domination!
Mecha-King Ghidorah in Godzilla: Save the Earth
Mecha-King Ghidorah in Godzilla Unleashed: Double Smash
Mecha-King Ghidorah in Godzilla Kaiju Collection
Mecha-King Ghidorah in Godzilla
- Godzilla vs. King Ghidorah (1991)
- Godzilla vs. Mechagodzilla II (1993) [Shogakukan]
- Godzilla: Rulers of Earth #15-16 (2014)
- Godzilla: Oblivion #4-5 (2016)
- Godzilla: Monsters & Protectors - All Hail the King! #5 (2023) [mentioned]
- Godzilla: Monsters & Protectors - Summer Smash (2023)
Some time after King Ghidorah's defeat, the Cryog located his dormant body and used Gigan to sever Ghidorah's middle head, outfitting the dragon with mechanical parts to make him stronger and grant them control over him. After Godzilla survived an onslaught of Mechagodzillas, Mecha-King Ghidorah was dispatched to his location and abducted him with his Godzilla Capture Devices and Machine Hand. Mecha-King Ghidorah, who was being telepathically controlled by the psychic twins Minette and Mallory working for the Cryog leader Rhizon, was ordered to take Godzilla to a robotics facility in Russia, which Rhizon had converted into a battle arena. While en route, Godzlla attempted to free himself, but was shocked both by the devices restraining him and one of Ghidorah's heads. Upon arrival, Mecha-King Ghidorah dropped Godzilla into the arena and landed on him before he could get back up, kicking him into two awaiting Mechagodzilla units. During this, the twins noted that either they were losing control over Mecha-King Ghidorah, or they never even had it in the first place. As the Mechagodzillas restrained him, Mecha-King Ghidorah struck Godzilla with his Gravity and Laser Beams at point-blank range. Godzilla was able to push one of the Mechagodzillas into Mecha-King Ghidorah and tackled the cyborg to the ground, but was unable to take on all three opponents at once as the Mechagodzillas helped Mecha-King Ghidorah beat Godzilla back, allowing the cyborg dragon to pick Godzilla up and throw him aside. During the fight, Godzilla destroyed the control antennas that were allowing Minette and Mallory to control Mecha-King Ghidorah. Though free from outside influence, the cyborg continued to overwhelm Godzilla until Anguirus escaped from the downed Kiryu's grip and entered the arena to help Godzilla. After Anguirus destroyed one of the Mechagodzilla units, Mecha-King Ghidorah attempted to take flight, only for Godzilla to use the remaining Mechagodzilla to knock him back to the ground. As Mecha-King Ghidorah recovered, Godzilla grabbed Anguirus by the tail and swung him into the dragon's body. Mecha-King Ghidorah attempted to grab Godzilla again with its mechanical hands, but Godzilla dodged the attack and tricked Mecha-King Ghidorah into grabbing the Mechagodzilla instead. After Godzilla destroyed the last Mechagodzilla, Mecha-King Ghidorah flew away into outer space under his own power. Though Rhizon wished to recover the cybernetic monster, Mecha-King Ghidorah eventually left the solar system and disappeared, with the Cryogs speculating that it was seeking out other members of its kind.
In efforts to stop Godzilla and return him to his home dimension, King Ghidorah's carcass was salvaged from the bottom of the ocean with the intent of reanimating it using cybernetic enhancements, which would also allow Dr. Eli Talbert's group to control it remotely. While an army of Mechagodzillas held Godzilla off, the plan was put into motion as King Ghidorah's corpse was outfitted with mechanical parts and a new mechanical head. Upon completion, pilot Ridley activated the new Mecha-King Ghidorah just as Godzilla arrived at the facility. As the battle began, however, the people of Earth-2 sent their monsters through the interdimensional portal, with all of them converging upon the site of the action as well. Mecha-King Ghidorah blasted a larval Mothra back with his laser beam, but quickly came under assault by the adult Mothra and Anguirus, who knocked the cyborg down. Despite his best efforts to hold the monsters off, Mecha-King Ghidorah was overwhelmed by the combined onslaught of Godzilla and all the other monsters. Eventually, Godzilla tore Mecha-King Ghidorah's center head off, killing him and Ridley in the process.
- Main article: Mecha-King Ghidorah/Gallery.
In other languages
- Spanish: Mecha-Rey Ghidorah
- Serbian and Russian: МехаКингГидора
Mecha-King Ghidorah uses the same modified Rodan roars as the organic King Ghidorah in Godzilla vs. King Ghidorah, with the addition of more mechanical-sounding roars emitted by the mechanical central head. Mecha-King Ghidorah's roars were reused for a space dragon in Kaizoku Sentai Gokaiger and Palkia in the Pokémon anime. They were also used for the organic King Ghidorah in the Atari and Pipeworks Godzilla video games.
- Yuji Kaida illustrated a character called "Mecha-Ghidorah" for the March 1983 issue of Terebi Magazine, over eight years before Godzilla vs. King Ghidorah was released. It was a golden robot built by the Dark Mysterious Star Alliance, a coalition of the Mysterians, Natarls, Xiliens, Kilaaks, M Space Hunter Nebula Aliens, Black Hole Planet 3 Aliens, and Messiah 13 Third Planet of Yomi Aliens. Each head could fire a different-colored ray, similar to early plans for King Ghidorah in Godzilla vs. King Ghidorah.
- Although the severely-wounded King Ghidorah was described as being just barely alive when the Emmy Kano found it, Mecha-King Ghidorah requires a human pilot to act, implying it is alive, but otherwise braindead.
- This suggests that King Ghidorah's central head is dominant over the others, although all three can think for themselves. This is demonstrated when the robotic head fires its laser beam, the other biological heads fire their gravity beams alongside it automatically.
- The Kaiju Guide from the PlayStation 3 and 4 Godzilla game incorrectly states that Mecha-King Ghidorah was still under the control of the Futurians, when in fact he was being piloted by Emmy Kano and M11, who were both defectors from the Futurian terrorists and working to defend Japan rather than destroy it.
- Mecha-King Ghidorah is the first example of King Ghidorah being heroic rather than villainous, although he was only acting under Emmy's control.
- An unused audio clip exists in the PlayStation 3 version of Godzilla of the G-Force operator saying Mecha-King Ghidorah's name, suggesting that he was supposed to appear but ended up being scrapped for unknown reasons. Nonetheless, Mecha-King Ghidorah later appeared in the PlayStation 4 version of the game.
- The use of Mecha-King Ghidorah's salvaged mechanical head to develop the technology to create Mechagodzilla in Godzilla vs. Mechagodzilla II is somewhat reflected in the Monsterverse, where Apex Cybernetics uses the skull from one of King Ghidorah's severed heads as a neural processor to control Mechagodzilla.
- In Shogakukan's manga adaptation of Godzilla vs. Mechagodzilla II, Mecha-King Ghidorah's surviving programming overrides control of Mechagodzilla from G-Force and resists their orders in a furious attempt to kill Godzilla. Something similar occurs in Godzilla vs. Kong, where copied energy from the Hollow Earth fed into Mechagodzilla causes King Ghidorah's consciousness to merge with the mecha's artificial intelligence and override control from its creators, after which it goes on a rampage and attempts to kill Godzilla.
- The spines on the back of Mecha-King Ghidorah's mechanical neck inspired the design of Mechagodzilla's dorsal plates in Godzilla vs. Kong.
- The heights for the Heisei King Ghidorah and Mecha-King Ghidorah are inconsistently listed as either 140 or 150 meters. The majority of sources state that King Ghidorah is 140 meters, though some books contemporary with Godzilla vs. King Ghidorah, such as the 1991 Godzilla vs. King Ghidorah Monster Complete Works (p. 10) and the early-1992 Godzilla Giant Monster Super Encyclopedia (p. 22), plus the 1995 Godzilla Giant Monster Diagram Encyclopedia (p. 94) and 1998 The Official Godzilla Compendium (p. 132) say King Ghidorah is 150 meters tall. However, the Battle History of Godzilla vs. King Ghidorah manga collection, released in January of 1992, says that King Ghidorah is 140 meters tall, and says that Mecha-King Ghidorah weighs 80,000 metric tons whereas Godzilla vs. King Ghidorah Monster Complete Works, Godzilla Giant Monster Super Encyclopedia, and Godzilla Giant Monster Diagram Encyclopedia erroneously give Mecha-King Ghidorah the same 70,000 metric ton weight as the regular King Ghidorah. A computer screen in Godzilla vs. Mechagodzilla II displays Mecha-King Ghidorah's height as 150 meters.
- The wingspans for the Heisei King Ghidorah and Mecha-King Ghidorah are inconsistently listed as being either 140, 150 or 175 meters. The 2014 book Godzilla Completely Deciphered (p. 75) and PlayStation 3 and 4 Godzilla video game's Kaiju Guide state that King Ghidorah's wingspan is 150 meters, while the 1998 The Official Godzilla Compendium says it is instead 175 meters (p. 132). The 1993 Encyclopedia of Godzilla (Mechagodzilla Edition) states that King Ghidorah's wingspan is 140 meters (p. 102).
- Godzilla vs. King Ghidorah Monster Complete Works, Godzilla Giant Monster Super Encyclopedia, and Godzilla Giant Monster Diagram Encyclopedia erroneously give Mecha-King Ghidorah the same 70,000 metric ton weight as the regular King Ghidorah.
- Episodes 51-56, 60-63, 66, 72, 107, 110, 113-114, 119-120, and 127.
- Misspelled as "Glavity Laser Cannon" and "Glabity Laser Cannon" in Godzilla vs. Mechagodzilla II.
This is a list of references for Mecha-King Ghidorah. 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: 
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