|Home world:||Planet Earth (Joneus Universe)|
|First appearance:||The☆Ultraman Episode 14|
Subtitle: Volcano Monster (火山怪獣 - Kazan Kaijū)
- Height: 123 m
- Weight: 61,000 t
As the meteor known as the Evil Star was passing Earth's orbit, animals from around the world became increasingly violent such as Monkey of the Scientific Defense Guard. The team was called out to deal with a gigantic prehistoric flying reptile named Gadon who was wondering around a volcano. Upon the Scientific Defense Guard encountering the monster, Gadon attacked mercilessly and easily out maneuvered them. Choici managed to distract Gadon long enough for the monster to be focused on him and later allowing him to turn into Ultraman Joneus. Shortly into the fight, Joneus knocked Gadon out with his wrestling techniques and threw the flying reptile into the nearby volcano where he exploded.
Powers and Abilities
- Flight: Gadon can fly at high speeds.
- Beak Gadon can use his beak to peck at foes.
|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|