Sildron (シルドロン Shirudoron), also known as Shieldron or Shieldoron, is an insectoid Kaiju from Ultraman Dyna who appeared in episode 5 "Winning Shot". Another Sildron, Clone Sildron (クローンシルドロン Kurōn Shirudoron), was a clone of the original Sildron who appeared in episode 16, "Battle! Monster Island".

Subtitle: Mutant Insect (変異昆虫 Hen'i konchū)


Ultraman Dyna

Sildron was a insect who mutated into a thick, oil/chemical drinking beast. He was seen doing wreckage to a chemical factory but did not attract the attention of Super GUTS since they were watching a game at a baseball stadium. After they finally got their heads screwed on right, they attacked Sildron using the GUTS Eagle; but could not since Sildron's third eye can sense the bullets and can raise his arms to deflect all shots. Eventually, Ultraman Dyna had to show up and take on the creature, but could not even dent the beast due to his danger predicting eye and his barrier-like arms. Soon, Dyna's Color Timer began to flash. Suddenly; the pitcher on Asuka's old baseball team showed up and taught Dyna how to use the Ultra Fork; an attack where Dyna concentrates his Solgent Beam into a baseball and hurls it. Although the first shot was deflected, Dyna did not give up and threw the second ball under Sildron's arms and hit him in the stomach. After being hit in his weak spot; Sildron fell over and exploded. Winning Shot

Sildron was recreated on an island and purposely used as a test item for Clone Silvergon. The two eventually fought and, although Sildron deflected most of Silvergon's attacks, it was soon knocked down by Silvergon's powerful tail and beaten to death when Silvergon rammed his tail on Sildron's head repeatedly. Battle! Monster Island


  • Suit actor: Toshio Miyake.
  • Although a cloned monster, Clone Sildron greatly varies from the original. Also in comparison to the original Sildron, Clone Sildron's color scheme is reddish purple (or magneta/pink) instead of brown.




  • Height: 63 m
  • Weight: 46,000 t
  • Origin: High purity power lines near mountains
Powers and Weapons
  • Armored Forearms: Sildron's arms are covered with hard plates that can deflect any attack.
  • Danger Predicting Sensor: Sildron has a third "eye" that can foresight attacks.

Clone Sildron

Clone Sildron

  • Height: 64 m
  • Weight: 47,000 t
  • Origin: Zarina Zone
Powers and Weapons
  • Armored Forearms: Clone Sildron's arms are covered with hard plates that can deflect any attack.

Other Media

Mega Monster Battle NEO: Ultra Monsters Arcade Game

Sildron's game card

Sildron reappeared as a card in this arcade game with the ability: Straight Combat is Powerful (ストレートには滅法強い Sutorēto ni wa meppō tsuyoi). This card is an ability card (yellow), and its ability is that it will let your defense increase for this round, and that your opponent will only guard (meaning that their speed will be lowered sharply).


The Sildron figures

Both versions of Sildron where only released once by Bandai in their 1998 Ultra Monster Series. Both toys have became rare in recent years and is valued by collectors. Both toys share the same mold and both have the same paintjob patterns as well, with highlights of yellow for Sildron and purple for Clone Sildron on the neck, torso, and thighs. Intricate pattern can also be found on the tail. There are much controversy surrounding the Clone Sildron figure, as Bandai had not bothered to mark the foot of the toy as a clone, just like the Clone Sildron toy. However, the toys are still eye candy and can be tons of fun for anyone, little kids and adults alike. Sildron was tagged as 116 and Clone Sildron was tagged 116-EX.


Ultraman Dyna


Ultraman Dyna Kaiju
Ultraman Dyna Sphere | Darambia | Giralen | Neo Darambia | Cyclometra | Grossyna | Daigerun | Sildron | Forgas | Alien Dais | Gyabish | Bao-on | Giaguard | Zenekindarl people | Dexador | Alien Meranie | Monsarger | Mukkito | Himala | Alien Mijir | Garaon | Alien Nuaza | Alien spirits | Alien Krea | Gyanzar | Clone Sildron | Clone Silvergon | Neosaurus | Alien Shilback | Zombayu | Bishmel | Kokakucho | Alien Lasesta | Sodom | Mozui | Diplas | Maricula | Sufume | Reicubas | Digon | Alien Chern Left | Alien Chern Right | Demagorg | Grossyna II | Male Gigantes | Female Gigantes | Gaigareid | Kogaraon | Garaon II | Gregorl-Man | Imitation Ultraman Dyna | Monsarger II | Lovemos | Satan Lovemos | Alien Naltis | Menorfa | Bazob | Geomos | Neo Geomos | Yumenokatamari | Bundar | Zomborg | Zomborg Soldiers | Clone Daigerun | Alien Jagira | Jagira Tree | God Jagira | Diaorius | Alien Reguran Captain Zoyaka | Mountain Gulliver 5 | Golza II | Graikis | Torongar | Churasa | Moravia | Mejiwogu | Phantom Monster Army (Evil Tiga, Gyanzar, Forgas, Kokakucho, Zenekindarl people, Alien Nuaza Efilis, Digon, Deathfacer, Alien Raybeak, Alien Natarn, Bishmel, Alien Manon, Mozui) | Alien Fabiras | Devil Fabiras | Alien Chadabin | Mogedon | Neo Darambia II | Terranoid | Zeluganoid | Neo Gaigareid | Gransphere
Ultraman Tiga & Ultraman Dyna: Warriors of the Star of Light Geranda | Alien Monera | Deathfacer | Queen Monera
Ultraman Dyna: The Return of Hanejiro Alien Mijir | Pudgy Garaon | Booska | Kamosuke | Casa Madara | Arwon | Alien Dehadoh (Mentioned) | Hanejiro | Alien Fabiras (Hologram) | Wanzetto
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