Home world: Planet Earth
First appearance: The Ultraman Episode 30
Latest appearance: {{{Latest appearance}}}
Height: 88 m
Weight: 13,000 t
Category: Kaiju
Affiliation: None
Roar(s): {{{Roar(s)}}}

Skeldon (スケルドン, Skeldon) was a monster that appeared in The Ultraman.

Subtitle: Bone Monster (骨怪獣, Bone Kaiju)



Appearing out the side of a mountain one night was the skeleton of a giant carnivorous dinosaur that even caught the attention of the Scientific Defense Guard. Within the course of a day the entire skeleton was removed from the mountain and taken to a local museum where it would be set on display. However, one night a security guard noticed that the unattached tailbones magically reattached themselves. With the body reconstructed, the monster Skeldon was reborn and began a rampage in Tokyo. Skeldon began to emit a toxic gas from its jaws, surrounding the city in a noxious vapor of death with the Scientific Defense Guard planning on how to fight the monster. After missiles from one of their fighters blew the remains apart, Skeldon reformed in no time.

Kei attempted to use a bazooka at the monster's skull only to miss and nearly die from the fumes. Just as Pigu saved Kei, Skeldon surrounded its body with flames and took off like a comet. Skeldon managed to allude the Self Defense Force as it laid in a sewage pipe to rest. Skeldon appeared the next night with the Scientific Defense Guard able to counter the toxic gas with a gas of their own. However, Skeldon managed to down their fighter, forcing Choichi to turn into Ultraman Joneus to stop the skeletal monster's rampage. Despite Joneus's best efforts, Skeldon used its reforming powers to outwit the hero and even took a direct hit from the Planium Beam without slowing down. In an attempt to find the monster's weak point, Joneus used the Ultra Stopper to hold Skeldon in place to see if he could locate it as the attack quickly drained his energy. After two more Planium Beams, Skeldon was finally destroyed and Joneus flew off.


  • Skeldon is based on Stegon.
  • Skeldon's roar is a mix of sounds used by the Toho monsters Varan and Ebirah.
  • Based on Skeldon's skull structure and the number of digits on his hands and toes (both being three each) it is likely descended from Allosauride genus of theropod dinosaurs.

Powers and Abilities

  • Reformation: Skeldon can reform if its body parts are scattered.
  • Toxic Gas: Skeldon can emit yellow toxic jaw from its jaws.
  • Electrical Resistance: Being entirely made of bone Skeldon has a high resistance to electricity.
  • Rib Boomerangs: Skeldon can launch its ribs like spinning boomerangs.
  • Body Flames: Skeldon can surround itself in purple flames to fly.


The☆Ultraman Kaiju & Seijin
Seagra | Spiral | Wanigodon | Red Smogy | Tough Gillan | Tough Gillas | Tough Gillaco | Firebadon | Combugon | Robot No.101 | Alien Baltan IV | Mikonos | Dolfiego | Xalome | Hectore | Liquid Monster | Opt | Garadoras | Xyclon | Gellon | Gadon | Goglan | King Moa | Badan | Islanda | Gerada | Janyur | Bedoran | Bader Group | Bagon | Janyur III | Zaanmoth | Zanba | Dragodos | Death Balan | Gibaaroga | Red King | Aboras | Banila | Earthtron | Ghostron | Gokinezula | Alien Baladon | Dabaran | Jadan | Jagon | Skeldon | Garbados | Megasaura | Babilar | Gamiba | Imedo Being | Goadarion | Jinario | Groteng | Plazoon | Agujon | Deathpower | Zuma | Gurol | Darantulas | Alien Noa | Heller | Roygar | Panther | Heller Army | Gumons | Hell Cat | Orolan | Gilos | Gilo | Fake Ultraman Joneus | Hatari | Large Battleship | Dostony | Spader | Caperadon | Alien Scien | Golding | Gedon | Hella Umaya | Heller Fleet | Makdatar