"If there was a space energy reading of zero, then there's nothing in front of Space Musketty. Literally nothing, I mean. Zero, a void. That light shown is our senses trying to perceive a total lack of information."

Guruman depicting Greeza's first form.

Greeza (グリーザ Gurīza) is the main antagonist of Ultraman X. A demonic space monster that wanders the universe, destroying all planets that give off biological signals, Greeza is the strongest enemy that X faces during the show's run.[1] It was a destructive being that targeted the life forms that were the most abundant in life energy from planets, and then left nothing in its wake, according to Ultraman X.[2]

Subtitle: Void Monster (虚空怪獣 Kokū Kaijū)


Pre-Ultraman X

"Greeza targets the life energy of planets, and leaves nothing in its wake. After Greeza destroyed three planets rich with life, I followed it to this solar system. When Greeza sets his sights on Earth, I was only able to defeat it by pushing it to the sun. It all happened fifteen years ago."

―Ultraman X, A Beautiful End
Fifteen years ago, after it destroyed three planets filled with life, Greeza desired to destroy the solar system. As it raced into the Milky Way, it met resistance in the form of Ultraman X. All for One Both Ultra and the figure clashed each others in their travel sphere forms until they reached the sun, where X takes this opportunity to throw the villain into it. However, this had become his greatest undoing, as the villain's demise had set forth the event of Ultra Flare, with said wave trapped X in a form of computer data and banished it to the Earth. A Voice From the Starry Sky

Ultraman X

"Come on, haven't you heard about this? One day, black lightning bolts began to strike this planet. Any monster they hit will go berserk, like they're being driven to destroy anything."
"Do you know what the Dark Thunder Energy is?"
"I'm sorry but I'm not that well-informed. But at this rate, your planet will be doomed. I've got it on good authority.

Dada and Daichi Oozora during the former's confession.
Greeza had in fact survived its supposed destruction, revived from the waves of Ultra Flare and launched the Dark Thunder Energy on Earth to turn monsters berserk and has been doing it for at least 18 days, starting at around Mercury, and then moving past Venus to reach the Earth, according to the UNVER HQ at Geneva. Its activities were notified by aliens hiding on the Earth, so much so that a Dada predicted that the Earth shall face extinction from the attack. To make this worse, the lightning was also being taken advantage by an evil faction during its debut, until they were defeated.

Sometime after a group Bugbuzuns' intrusion to Earth, Mamoru and Wataru spotted Greeza in its first form when they were flying past the moon and it's contact made the Space Musketty lose contact with headquarters. Greeza eventually landed on Earth and completely obliterated the UNVER base in Nevada and absorbed all of the Spark Dolls there because it sensed that place as the largest source of Spark Dolls in the world and that Earth's monsters are the most abundant in life energy. Greeza then turned into its second form and flew straight to the second largest source, which just so happened to be the Xio headquarters in Japan.

On its way to Japan, it is met by opposition by Xio USA in the North Pacific airspace and they launch Perseus missiles at Greeza, but it dodges them all and destroys the resistance. It then zooms in on the Xio base when Daichi turns into Ultraman X and he turns into his Exceed X form immediately to stop it. After a quick tussle, X is joined by Hayato in the Sky Musketty and Cyber Gomora to stop Greeza, but the alien gains the upper hand due to its distortion, shielding, and strong attacks. Eventually he downs the Sky Musketty with its beam, and unrealizes Cyber Gomora with its vortex, which also interfered with the electricty in the surrounding area as well. X tried to use the Exceed X Slash on Greeza, but it absorbed him. Unfortunately for Greeza, this lead to a mistake as it was presumably killed as X blew it up from within.A Beautiful End

Soon afterwards, Greeza regenerated and re-enact its attack on the Xio base and was met with resistance by Cyber Gomora again. Greeza quickly made work of it and, at the same time, destroyed the Xio base with its energy attacks. The alien then absorbed all of the Spark Dolls at the base, even the recently revived EX Red King, Tsurugi Demaaga, and EX Gomora, until he transformed into its final form. Then, Greeza resumed its rampage on Earth despite the obstacle of Xio. Before he could finish them off, Wataru and Mamoru returned in the Space Musketty and destroyed the energy ball meant for Xio.

Soon enough, Daichi and X reunited and stood in Greeza's way once more. Even in its Exceed X form, the Ultraman couldn't keep up Greeza and its new powers gained from the Spark Dolls, including Gomora's Super Oscillatory Wave and EX Red King's Flame Road, but then Daichi reached out to Gomora and struck Greeza in the chest, resulting in all of the Spark Dolls it absorbed coming to X and he united with him to form the Hybrid Armor. Greeza was eventually defeated once and for all with the Ultimate Xanadium, powered by all of the Cyber Cards and Spark Dolls. The Rainbow Land

Ultraman Z

During the evening after Z defeated Bullton, a strange dimensional rift appeared in the sky, heralding Greeza's arrival. Four-Dimensional Capriccio


First Form

First Form (第1形態 Dai Ichi Keitai) is Greeza's original appearance, which was prior to its arrival on Earth.

  • Height: Immeasurable
  • Weight: Immeasurable
  • Origin: Space
Powers and Weapons
  • Space-Time Distortion: Greeza's true nature is a sentient space anomaly which cannot be detected due to its low energy levels and presence. As it is physically nothing, the white ray it emits is basically how human brains perceive it as "nothingness".
  • Greeza Dark Lightning (グリーザダークライトニング Gurīza Dāku Raitoningu): Greeza can launch a stream of dark lightning bolt which capable of weakening light beings and empowering monsters and aliens. This lightning functions to detect emitters of bio-energy in life forms, thus turning them powerful and berserk are simple side effects. Despite having a name of it's own, it was labelled as Dark Thunder Energy (ダークサンダーエナジー Dāku Sandā Enajī) by Xio members on Earth.
  • Life Force Sensing: Greeza can sense the life energy of beings, even from across space, which is how he hunts. Its primary targets are Kaiju, even in Spark Doll form, and then the other life forms on a planet.
  • Greeza Absorption (グリーザアブソープション Gurīza Abusōpushon): Greeza can gain power from the life forms he absorbs. This allows it to mature.
    • Evolution: Greeza can evolve itself to its second form, allowing it to adapt in Earth environments.
  • Travel Ball: Greeza can turn itself into an energy ball for transportation. Said transportation is durable enough to collide with X's during their travel to Milky Way.
  • Flight: Greeza can perform an anti-gravity flight.

Second Form

Second Form (第二形態 Dai Ni Keitai) is Greeza's humanoid form, which it obtained from absorbing Spark Dolls in UNVER Nevada Base. Aside from being sleeker, Greeza can also adapt to Earth environment.

  • Height: Immeasurable
  • Weight: Immeasurable
  • Origin: UNVER Nevada Base
Powers and Weapons
  • Space Time Distortion: Greeza seems to be a walking spacial anomaly, warping space around its self at all times, resulting in its erratic movements. This can result in it suddenly teleporting, hyper-speed traveling, stopping its enemy mid punch, and an energy field that deflects light bullets. This ability was forsaken thanks to the Xlugger, which manages to turn Greeza into a physical body moments before Exceed X self destructed from within.
    • Shielding: Greeza is capable of creating a barely visible, circular energy shield to neutralize stronger attacks.
  • Greeza Dark Lightning (グリーザダークライトニング Gurīza Dāku Raitoningu): Greeza can launch a stream of dark lightning bolt which capable of weakening light beings and empowering monsters and aliens. It appears to have a version of this that is just for attacking. Despite having a name of its own, this technique was labelled as Dark Thunder Energy (ダークサンダーエナジー Dāku Sandā Enajī) by Xio members.
  • Greeza Beam (グリーザビーム Gurīza Bīmu): An energy attack that is launched from its head or from its back.
  • Greeza Double Helix (グリーザダブルへリックス Gurīza Daburu Herikkusu): Greeza's strongest attack, launched from its chest.
  • Life Force Sensing: Greeza can sense the life energy of beings, even from across space, which is how he hunts. Its primary targets are Kaiju, even in Spark Doll form, and then the other life forms on a planet.
  • Greeza Absorption (グリーザアブソープション Gurīza Abusōpushon): Greeza can also absorb incoming attacks, even those of sacrificial bullets by creating a black hole first.
    • Dark Thunder Absorption (ダークサンダーアブソープション Dāku Sandā Abusōpushon): Greeza can gain power from the life forms he absorbs, this allows it to mature. It appears as a portal of light from the core on its chest, from which ghostly hands stretch and pull in any life form they can capture.
      • Evolution: Greeza can evolve itself to its final form once absorbing enough life forms.
  • Greeza Vortex (グリーザボルテックス Gurīza Borutekkusu) Greeza shoots a purple or dark red oscillating energy beam from its head.
  • Greeza Akuon (グリーザアクオン Gurīza Akuon): Greeza can unleash shock waves that can cause electrical devices to malfunction, it can also put strain on its enemies.
  • Flight: Greeza can perform an anti-gravity flight.
  • Regeneration: Greeza can regenerate itself after its destruction.
  • Energy Whips: Greeza can summon five energy orbs which unleash energy whips to ensnare the opponent.

Final Form

Final Form (最終形態 Saishū Keitai) is the result of Greeza absorbing all Spark Dolls in Operation Base X. It appears as the second form donning a set of armor with protrusions.

  • Height: Immeasurable
  • Weight: Immeasurable
  • Origin: Operation Base X (Japan)
  • Weakness: The final form of Greeza is no longer a space anomaly, thanks to the Xlugger forcing it into a physical body during the destroyer's second form, therefore allowing X Hybrid Armor to simply destroy it.
Powers and Weapons
  • Greeza Dark Lightning (グリーザダークライトニング Gurīza Dāku Raitoningu): Greeza can launch a stream of dark lightning bolt which capable of weakening light beings and empowering monsters and aliens. Despite having a name of its own, it was labelled as Dark Thunder Energy (ダークサンダーエナジー Dāku Sandā Enajī) by Xio members on Earth.
  • Greeza Beam (グリーザビーム Gurīza Bīmu): An energy attack that is launched from its head.
  • Greeza Absorption (グリーザアブソープション Gurīza Abusōpushon): Greeza can absorb incoming attacks, first by encasing them in spherical forms before absorbing them to return fire with its own version.
  • Armor: Aside from the dermal armor, as a result of its evolution, Greeza is equipped with a bigger armor, ranging from its jacket, gauntlets and hip armors. It serves as a dark counterpart to X's MonsArmors, particularly for "borrowing" a Kaiju's powers as well.
  • Barrier: Greeza is capable of creating a circular energy to neutralize stronger attacks.
  • Energy Missiles: Greeza is capable of launching numerous Energy Missles from all of its body, depending on it's power.
  • Spark Doll Powers: Having absorbed the Spark Dolls, Greeza can utilize their powers in its own version. Whenever he utilize their powers, the corresponding Kaiju roars can be heard on the background.
    • Greeza Shock (グリーザショック Gurīza Shokku): Eleking's Electric Tail, Greeza can unleash electric whips to ensnare opponents.
    • Greeza Flame Road (グリーザフレイムロード Gurīza Fureimu Rōdo): EX Red King's power, Greeza can launch a series of massive eruptions capable of dealing damage to even the strongest of opponents.
    • Greeza Magma Attack (グリーザマグマアタック Gurīza Maguma Atakku): Based on Demaaga's fireball eruption, Greeza can launch fireballs at multiple directions from its chest.
    • Greeza Oscillatory Wave (グリーザ振動波 Gurīza Shindō-ha): Based on Gomora's Super Oscillatory Wave, Greeza first rushed towards the opponent and deliver a large shockwave which forcefully repels them. Its tactic is more likely based on the Zero Shoot variation, due to being made in a manner of point blank.
    • Greeza Red Heat Ray (グリーザ赤色熱線 Gurīza Sekishoku Nessen): Based on Zetton's 1 Trillion Degree Fireball, Greeza can launch a single destructive fireball from its chest.

Cyber Greeza
Ultraman X Cyber Greeza Card

Cyber Greeza (サイバーグリーザ Saibā Gurīza)

  • Height: Unknown
  • Weight: Unknown
  • Origin: Xio Headquarters
  • Cyber Power: 25/25
Powers and Weapons


Dark Thunder Energy Victims



Ultraman X



  • The prop of Greeza's first form was recycled from the Purana in Neo Ultra Q.[3] Said prop would later be reverted back in Purana in Ultraman Taiga.
  • Greeza's second form's unstable movement was due to its nature being "nonexistent" and a walking space anomaly, therefore its existance is an instability to itself and its surroundings. Said movement was inspired from butoh, a form of Japanese dance theatre that encompasses a diverse range of activities, techniques and motivations for dance, performance, or movement.[4]
  • Kiyotaka Taguchi, revealed that before Ultraman Exceed X sacrificed himself to blow up Greeza from within, his Xlugger provided Greeza a physical body. Once Greeza reconstituted from its apparent destruction, it was no longer a space anomaly and therefore it physically existed. However, this was also a primary factor to its fall, as Greeza's current state allowed the Xlugger to finish it.[5]
  • Greeza's name comes from words Greed and Glee.[6]
  • One of the series' writers, Hirotoshi Kobayashi, said that a motif in Greeza's design was its own traumatic image of Zetton when he was a child.[7]
  • Another writer, Takao Nakano, has stated that Greeza's final form with its spike armor was inspired from the Sagrada Família church.
    • The final form's suit was simply the second form equipped with a jacket-like prop and a pair of gauntlets to make up its talons. Said prop however was too bulky and heavy for the suit actor to handle, thus not much physical movements were made by Greeza during recording.
  • Out of all Cyber Cards, Greeza is the first to have its Cyber Power rated full.
  • In Xio's database display, its categorization was defined as "TYPE UNKNOWN". Despite its given subtitle "Void Monster", its Cyber Card set is categorized as "Type A (Alien)".
    • It was revealed by Kiyotaka Taguchi that he purposely used the "Kaiju" term, and stated that Greeza is "A non-existent monster, to the point that it can't even describe its subject, life form, and appearance".[8]


Ultraman X Kaiju
Ultraman X Greeza | Bemular | Aboras | Banila | Pestar | Magular | Peguila | Cyber Gomora | Demaaga | Alien Fanton Guruman | Birdon | Telesdon | Underground Woman | Alien Zarab | Bemstar | Black King | Black King Drill Custom | Alien Nackle Bandero | Alien Gold tE-rU | Rudian | Gargorgon | Zetton | Alien Sran Quila | Alien Valky Halky | Alien Icarus Icary | Alien Nackle Nackley | Samekujira Jolly | Alien Babarue | Dada | Kemur Man | Alien Zetton | Alien Akumania Referee | Houlinga | King Joe | Gina Spectre | Tsurugi Demaaga | Zaragas | Alien Magma | Alien Shaplay | Mold Spectre | Shepherdon | Windom | Miclas | Agira | Alien Markind | Mecha Gomora | Juda Spectre | Guar Spectre | Gomess (S) | Gubila | Cicada Woman | Pigmon | King Guesra | Red King | EX Red King | Space Cat Mu | Dorako | M1 | Gomora | EX Gomora | Bugbuzun Brood | Terochilus
Ultraman X The Movie: Here He Comes! Our Ultraman Alien Fanton Guruman | Cyber Gomora | Zaigorg | Gorg Antlar | Gorg Fire Golza | Tsurugi Demaaga | Alien Baltan | Desastro
Ultraman Festival 2015 Alien Selemo Marie | Skedon | Cyber Skedon | Denpagon | Cyber Denpagon
Ultraman Taiga Kaiju
Ultraman Taiga Alien Rivers Kawazu | Homare Soya | Alien Ckalutch | Cicada Human | Alien Magma Maguma | Baby Zandrias | Zegun | Young Mother Zandrias | Alien Markind Markind | Hellberus | Baby Guesra Chibisuke | Lecuum | King Guesra Chibisuke | Galactron MK2 | Darebolic (MB) | Alien Fanton | Alien Zetton Zolin | Volk | Alien Serpent | Garmes Man | Hupnath | Alien Pedan | Chiburoid | Alien Seger Aoi | Segmeger | Alien Damara | Alien Gapiya Abel | Cicada Girl | Alien Perolynga | Alien Babarue | Alien Hook | Night Fang | Majappa | Maiko Namekata | Alien Keel | Hupnath | Alien Nackle Odyssa | Black King | Maria | Alien Zelan Oshoro | Pagos | Gymaira | Ilt | Gigadelos | Lunah | Alien Galo | Dethmon | Purana | Baby Samekujira | Lim Eleking | Baby Vadata | Alien Chibull Mabuze | Skull Gomora | Alien Semon Meed | Demaaga | Bemular | Alien Bat Seiji Komori | Alien Pitt Hitomi Mizuno | Zetton | Gorothunder | Mystie | Alien Bado El-Ray | Aribunta | Pandon | Alien Ghos | Takkong | Shinji | Giestron | Alien Godola | Alien Sran | Alien Zarab | Woola
Ultraman Taiga The Movie: New Generation Climax Alien Keel | Alien Serpent | Lecuum | Alien Fanton | Alien Zelan | Hellberus | Segmeger | Night Fang | Gigadelos | Gorothunder | Legionoid Dada Customize | Dada | Alien Ckalutch | Alien Bado | Alien Shaplay | Alien Groza | Grimdo
Tri-Squad VoiceDrama Kishiader | Gerg | Imbiza | Modified Brocken | Mecha Birdon | Zaragas | Alien Iyros | Beacon | Modified Muruchi | Pestria | Paraidar | Dairaoh | Ilia | Alien Godmes
Tregear's Story/Blue Shadow Gagoze | Snark | Mulnau | Leugocyte | Greeza | Alien Pegassa Pega | Snake Darkness
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
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