Neronga (ネロンガ) is an ancient kaiju that first appeared sleeping beneath a well near Kazumi, only to awaken and go on a feeding rampage but was stopped by Ultraman. A second Neronga appeared on Planet Boris.

Subtitle: Invisible Monster (透明怪獣 Tōmei Kaijū)




Neronga's first appearance

Awoken by man and bellowing in hunger, Neronga emerged from underground, and headed for a nearby power plant to drain the energy. Soon the Science Patrol is called in to locate the monster. On arrival, Neronga was invisible and attacking a Transition Station, attacking and the Science Patrol began to open fire with their lasers, only angering the beast, who struck back with a beam of electricity. The crew survived, but Neronga escaped, looking for more energy.

Predicting Neronga would attack at another power plant, the Science Patrol forced the monster to become visible with their weaponry. Enraged, Neronga fought back by hurling a huge ship, destroying the entire plant and resumed attacking the Science Patrol with his electric bolts. One of the Science Patrol members managed to blow out one of Neronga's eyes but this only angered the monster even more. Hayata transformed into Ultraman and manhandles the beast, beating him like crazy, but Neronga still fought back. Before long, Ultraman tossed the monster into the air, and finished it with the Specium Ray.


Ultraman vs Neronga & Alien Baltan

Neronga as Alien Baltan's pawn

  • Old promotional photos seem to imply Neronga was originally intended to be a pawn of Alien Baltan. In the same photos Neronga is brown in color and lacks the antennae on his head.
    • Neronga's data base image in Ultraman Mebius shows him with out his antennae as well. 
  • During Neronga's first attack he is seen without the antennae on his head (much like the photos mentioned above). The Yamanaya figure also lacks the antennae.
  • In akin to the original Ultraman, the 1995 Bandai figure was modified from the 1992 Baragon figure.
  • Neronga is the first quadrupedal monster to fight against an Ultra Warrior.
  • In Return of Ultraman episode 15, Neronga is mistaken for Eledortus when he first appeared, and later Neronga is compared to Eledortus by MAT.
  • After Gabora was killed, the suit was reverted back to Neronga, where it made public appearances, until it was sent back to Toho to be used in the construction of Baragon for Destroy All Monsters.

Ultra Galaxy Mega Monster Battle


Neronga reappeared in episode 3 of the series, Ultra Galaxy Mega Monster Battle.

Neronga was first seen battling against a Gudon. At first it seemed Gudon had the upper hand, but when Neronga used his invisibility technique he outsmarted and distracted Gudon long enough to kill him with his electricity bolts. After the match, Neronga proceeded to feed on the electricity of a nearby radio station. The next day, Neronga was wandering the area looking for more electricity, ultimately setting his sights on the ZAP SPACY where the monster attacked them looking for more electricity. Rei summoned Gomora to do battle against the monster and it seemed Gomora had the upper hand, but Neronga used his invisibility technique against to try and distract Gomora to kill him. Listening closely to Neronga's movements, Rei guided Gomora into attacking the invisible Neronga and successfully destroyed the monster as a result.

Sometime later when the monster Bullton appeared before ZAP SPACY, Neronga was revived alongside Red King and Telesdon. Neronga was the first to charge into battle against Gomora and Litra. While Telesdon fought Litra, he accidentally killed Neronga with his flame breath.


  • Neronga was created from a reused Geronga suit. Interestingly enough, Geronga himself is a direct tribute to Neronga, since Neronga pre-dates Geronga by nearly 40 years.
    • And just like the original Neronga, the suit from Ultra Galaxy would be used to make Magular.
  • During the opening credits to the series, Neronga is seen battling Telesdon, even though both monsters worked together when they were revived by Bullton.
  • From this series omwards, Neronga is changed to a biped whereas the original was primarily quadrupedal.

Ultraman X

It is evidently that Neronga's Spark Doll was collected and used to create Cyber Neronga (サイバーネロンガ Saibā Neronga). The monster's design was used by Xio as one of their target practice, alongside Cyber Zarab. Feature Report! 24 Hours Inside Xio

Cyber Neronga reappeared as a Cyber Card in the final episode of Ultraman X. After Ultraman X spoke out to Gomora and striked Greeza right in the center of his chest, Neronga, along with all of the other Cyber Cards, traveled to X and united with him. Cyber Neronga's power was used to help form the Hybrid Armor and power up the Ultimate Xanadium to defeat Greeza once and for all. Neronga, along with the numerous other Cyber Cards and Spark Dolls, then appeared and thanked Daichi as he thanked them.The Rainbow Land

Ultraman R/B


Neronga returns in this series, making its first in-suit appearance after 10 years. Neronga was summoned by Saki Mitsurugi, who had recently taken over Aizen Tech. She used Neronga to redirect electrical energy from a nearby electrical tower to Aizen Tech's premises, for purposes unknown. Ultraman Rosso and Ultraman Blu arrived to deal with Neronga, but they were both caught off guard by its invisibility powers and electrical attacks. After giving them a beatdown, Neronga was recalled by Saki, reverting it back to its R/B Crystal.

When Katsumi Minato and Isami Minato confronted Aizen Tech's new president while she was talking to Asahi Minato, she revealed herself to be the one summoning monsters recently as she unveiled her special Gyro to call Neronga into action again. The brothers transformed to fight, and this time they thought of a way to counter its invisibility, which was by covering it in sand. The brothers then used the power of the Kiwami Crystal to transform into Ultraman Ruebe, who finished it off with the Ruebe Kourin Shot after a brief fight.This Moment Is A Bond


  • Suit Actor: Hiroyuki Arai
  • A new suit was constructed for Neronga's appearance in this show.
  • Its two newer attacks in this series is partly due to being summoned by Saki's Gyro, which is said to have the property of empowering the summoned/transformed monster.


  • Height: 45 m
  • Weight: 40,000 t
  • Origin: Said to be Miyama (Ultraman), Underground of Planet Boris (Ultra Galaxy)
  • Attack: 800
  • Defense: 1100
  • Speed: 1000
Powers and Weapons
  • Burrowing: Neronga can submerge itself from the underground.
  • Despotic Electric Attack (暴君電撃 Bōkun Dengeki): Neronga can fire powerful bolts of electricity in rapid succession from the tips of his horns and his nasal​ horn. These bolts are strong enough to kill weaker monsters in a few blasts, but if Neronga runs low on energy, it is not very powerful, unable to kill even a man. When using this its horns will flip forward.
  • Invisibility/Transparency: Neronga can turn invisible at will after feeding on a certain amount of electricity. When invisible, he can also move at incredible speed, allowing him to run around and confuse opponents and attack them from afar.
  • Electricity Absorption: Instead of feeding on food for a diet, Neronga feeds on raw electricity in order to empower himself, making him immune to electrical attacks.
  • Thunder Connection (サンダーコネクション Sandā Konekushon): A tag-team attack with Eleking. The former wrapped Neronga's body with its tail to supercharge the latter with volts of electricity, before Neronga used both Eleking and its own power to deliver a huge lightning bolt attack towards the target.
Ultraman R/B
  • Despotic Electric Ball (暴君電光弾 Bōkun Denkō-dan): Neronga can create five balls of electricity and launch them at its opponent. When using this its horns will flip forward.
  • Despotic Attack Rush (暴君撃突進 Bōkun Geki Tosshin): Neronga surrounds itself with electricity and charges towards the opponent. However, the only time this was ever attempted, it failed.
  • If struck by an attack by an enemy or low on energy when about to be invisible, Neronga will be left weakened and become powerless/visible.
  • Its invisibility can be negated if its body is completely covered by things like dirt.

Cyber Neronga
Ultraman X Cyber Neronga Card

Cyber Neronga

  • Height: 45 m
  • Weight: 40,000 t
  • Origin: Xio headquarters
Powers and Weapons
  • TBA

Other Media

Mega Monster Rush Ultra Frontier

Neronga appears in two mini-videos for this video game to act as sport for the main alien trio. His head has plasma crystals that, when destroyed, act as game points for the player.

Neronga Hunting

After the Rush Hunters Barel, Magna, and Garm take the Red King's Plasma Souls, a thunderstorm awakens the Neronga, who attacks the hunters after feeding on a lightning bolt. Garm uses the Hawkeye Shot several times, but to no avail. Magna spies its footprints, and attempts to use Force Sabre, but bounces off the creature's forehead and flies into a stalagmite. Garm then tells Barel and Magna that Neronga can only stay invisible for a certain amount of time after absorbing some electricity. They regroup as Neronga absorbs another lightning bolt and vanishes. Garm then gives the others his plan, which is put into action. Barel uses his copies as decoys to make the Neronga shoot out all its energy. Magna uses his metal arm as a lightning rod, to prevent the Neronga from absorbing any more lightning. As soon as Neronga becomes visible, Barel uses his scarf to bind Neronga's nose horn and trap it long enough for Garm to shoot its Plasma Souls.

Plasma Killersaurus Hunting

Neronga appeared at the very end alongside Red King, Dinosaur Tank, Antlar, Eleking, Verokron, King Joe, Gandar, and Super Earth Gomora and about to face off against the trio and many Alien Metron, Waroga, Kyrieloid, Alien Zarab, other Alien Guts, Alien Babarue, Alien Chibu in exosuits, Yapool, Alien Temperor, Alien Nackle, and other Alien Magma.

Kaiju Busters

Neronga appeared in this game, as well as a black-colored subspecies called Neronga Black.



Ultra Galaxy Mega Monster Battle

Mega Monster Rush Ultra Frontier

Ultraman R/B


Ultraman Kaiju & Seijin
Bemular | Alien Baltan | Neronga | Ragon | Greenmons | Guesra | Antlar | Red King | Chandora | Magular | Suflan | Pigmon | Gabora | Jirass | Gango | Mummy Man | Dodongo | Pestar | Gamakujira | Gavadon | Alien Baltan II | Bullton | Alien Zarab | Aboras | Banila | Hydra | Kemular | Underground People | Telesdon | Jamila | Gubila | Gigass | Dorako | Red King II | Suflan II | Gomora | Dada | Goldon | Woo | Keronia | Zambolar | Alien Mefilas | Giant Member Fuji | Alien Baltan III | Kemur Man II | Alien Zarab II | Skydon | Seabozu | Zaragas | Re-Pigmon | Re-Dorako | Re-Telesdon | Geronimon | Kiyla | Saigo | Alien Zetton | Zetton
Ultra Galaxy Kaiju & Seijin
Ultra Galaxy Mega Monster Battle Telesdon | Sadola | Red King | Rei's Gomora | Rei's Litra (S) | Juran | Golza | Gudon | Neronga | Bemstar | Fire Litra | Fire Golza | Gan Q | Banpira | Twin Tail | Frogos (B) | Bullton | Cherubim | Arstron | Eleking | Gromite | Angross | Arigera | Zoa Muruchi | Nova | Saramandora | Lunaticks | King Joe Black | Verokron | Doragory | Kate | Zetton | Reimon | EX Gomora
Ultra Galaxy Mega Monster Battle: Never Ending Odyssey Alien Pitt | Reionics Hunter | Gomess (S) | Magular | Rei's Gomora | Dorako | Eleking |Alien Hook | Rei's Litra (S) | Alien Guts | Alien Zelan | Arstron | Alien Nackle | Galberos | Illusion Zetton | Reimon Burst Mode | Reionic Burst Gomora | Doragory | Alien Metron | Bemstar | Alien Babarue | Antlar | Vakishim | Alien Keel Grande | Tyrant | Kate | Fire Litra | Alien Zarab | Imitation Ultraman | Alien Mefilas | Armored Mefilas | Dada | Alien Temperor | Arigera | Armored Darkness | Miclas | Alien Zetton | Telesdon | King Joe Black | Cherubim | Red King | Alien Reflect | Birdon | King Joe Scarlet | Alien Rayblood | EX Gomora | EX Red King
Mega Monster Battle: Ultra Galaxy Legends The Movie Bemular | Alien Zarab | Zaragas | Rei's Gomora | Dorako | Bemstar | Saramandora | Alien Shaplay | Windom | Miclas | Agira | Pigmon | Black King | Rei's Litra (S) | Gomess (S) | Alien Baltan | Antlar | Red King | Magular | Telesdon | Dada | Zetton | Eleking | Alien Metron | Alien Guts | Arstron | Sadola | Gudon | Twin Tail | Alien Nackle | Verokron | Vakishim | Doragory | Lunaticks | Birdon | Mukadender | Alien Temperor | Tyrant | Alien Valky | Alien Magma | Alien Pressure | Alien Babarue | Nova | Hoe | Fire Golza | Gan Q | Galberos | Frogos (B) | Banpira | Cherubim | Gromite | Zoa Muruchi | Alien Reflect | Angross | Jasyuline | Arigera | Roberuga II | King Joe Black | Super Alien Hipporito | King Silvergon | King Goldras | King Pandon | King Guesra | Alien Zetton | Nurse | Beryudora
Ultra Galaxy Legend Gaiden: Ultraman Zero vs. Darklops Zero Rei's Gomora | Rei's Litra (S) | Darklops Zero | Mecha Gomora | Alien Salome | Imitation Ultraseven | Imitation Ultraman (SR) | Imitation Ultraman Jack (SR) | Imitation Ultraman Ace (SR) | Imitation Zoffy (SR)
Mega Monster Battle: Ultra Adventure Bullton | Gomora | Pigmon | Red King | Alien Pedan | Alien Hipporito | Bemular | Alien Nackle | Yapool | EX Tyrant | Alien Keel Vittorio | EX Gomora | Alien Zarab | EX Eleking | Alien Metron | EX Red King | Alien Babarue | King of Mons | Bajiris | Baby Arados | Alien Rayblood | Grand King | Silver Bloome | Deathfacer
Mega Monster Battle: Ultra Adventure NEO Kyrieloid | Kanegon | Red King | Agira | Vittorio | Alien Guts | Gatanothor | EX Zetton | Rayblood | Kate
Ultraman R/B Kaiju & Seijin
Ultraman R/B Grigio Bone | Cereza | Black King | Gargorgon | Red King | Gue-Basser | Mecha Gomora | Aribunta | Ultraman Orb Dark | Gomess (S) | Horoboros | Bezelb | Gubila | Grigio King | Neronga | Pigmon | Booska | Dada | Alien Zarab | Alien Mefilas | Alien Chibu | Alien Bado | Alien Pitt | Alien Nackle | King Joe | Grand King Megalos | Gomora | Kamisori Demaaga | Grigio Regina | Reugosite
Ultraman R/B The Movie: Select! The Crystal of Bond Bemstar | Gan Q | Alien Pegassa Pega | Mecha Gomora | Snake Darkness | Pigmon | Grigio Regina
Ultraman R/B Novel: The Blue-Eyed Girl Whose Name is Gray Bakubarba | Nero | Margodon | Grigio | Fearmonger | Alien Egon Ciel | Barrigator No. 1 and 2 | Reugosite
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