Subtitle: Transforming Monster (変身怪獣 Henshin Kaijū)
- Height: 2 ~ 55 m
- Weight: 90 kg ~ 30,000 t
- Origin: Unknown planet in space
In the outer reaches of space, Argon had planned to invade earth, studying its defense and the UGM. And so, he came in two saucers, easily slipping past the UGM's radar. Then he attacked. One of the saucers was taken out in an ensuing dogfight, but he left his human form on earth, where it was taken in by a well meaning girl.
When she tried to take him to the UGM, he revealed he fooled her, and transformed into Argon. Tanks seemed to hold him off until his saucer also joined the fight. Jun attacked and held him off until Takeshi transformed into 80! The two battled briefly, but the monster could not rival the Ultra Warrior. He was destroyed.
- Human Actor: Katsumi Hirano.
- Argon was created from the suit of Lavras.
- Argon's roar is a reused Unitang roar.
- Powers and Weapons
- Mouth Energy Beam: Argon can fire an explosive energy beam from his mouth.
- Human Form: Argon can appear as a normal human.
- Saucer: Argon has a saucer which he uses to travel.
- Energy Bolt: This saucer also can fire red colored energy beams for attacking purposes.
|Ultraman 80 Kaiju & Seijin|
|Crescent | Gikogilar | Hoe | Zandrias | Alien Bam | Mechagiras | Abdolaars | Noiseler | Tabra | Gabishale | Jakki | Aruma | Zuruzla | Medan | Alien Vibros | Gora | Alien Gorgon | Saramandora | Zarudon | Myu | Devilon | Alien Ruria | Sawako Hoshi | Lavras | Daron | Gymaira | Gaus | Okorin Ball | Alien L85 Zuckal | Gamos | Underground Men | Queen Einus | Gomora II | Amoeza | Alien Fantas | Robo-Fo | Argon | Akuzone | Gera | Alien Argo | Val | Zakira | Cathy | Alien Zatan | Zatan Silver | Zora | Barrack Ship | Gazera | Angoras | Fire-Draco | Kuwaganda | Baltan Warship | Alien Baltan V | Ghostdon | Tetsuon | Space Plant | Jihibikiran | Barebadon | Zurasuimar | Alien Galagala | King Galtan | Delusion Ultraseven | Alien Baltan VI | Marjin | Red King III | Glovusk | Idantenran | Plazma | Minazma | Margodon|