|Home world:||Planet Gomerus|
|First appearance:||Fireman episode 6: "The Secret of Planet Gomerous"|
|Affiliation:||Planet Gomerus (maker)|
Subtitle: Space Dinosaur (宇宙恐竜, Uchū Kyōryū)
- Height: 38 m
- Weight: 26,000 t
- Origin: Planet Gomeros
Spacer was a monster held by Planet Gomerus as the planet went rouge. Spacer was summoned from the underground of Gomerus at a time but went back in.
As Fireman went to rescue to the trapped SAF group, Spacer awoke and attacked Fireman! Spacer took a toll of Fireman with its toxic gas. Gomerus helped Spacer as its tentacles choked Fireman. Fireman then backfliped and destroyed Spacer with his Fire Flash.
- Spacer is one of the rare times another kaiju from Fireman appeared in an Ultra series, appearing in the Ultraman Ace manga.
- Spacer shares the same subtitle as the Ultraman kaiju, Zetton.
- Spacer resembles the Ultraman Leo kaiju, Black End.
Powers and Abilities
- Gas: From his mouth, Spacer can spit an orange toxic gas.
- Tendrils: Instead of arms, Spacer has massive tendrils.
|Fireman Kaiju & Seijin|
|Dorigorus | Dorigon | Stegorus | Alien Meteor | Jurasairous | Planet Gomerus | Spacer | Kinokurages | Twin Tail | Kumagorus | Nerogiras | Gudon | Stegorus II | Rodoguros | Alien Baranda | Baranda V | Scoradon | Alien Barogu | Terasaurous | Dorango | Alien Tran | Tyrannodon | Lanosaurus | Alien Velder | Terasaurous II | Long Neck | Alien Atla | King Zauras | Alien Sulpher | King Zauras II | MukuMuku | Makurosaurous | Gagango | Alien Gagango | Double God | Death Torosaurus | Alien Prima | Destrosaurous | Alien Green | Green Giller | Haromongan | Alien Virenus | Gadorasaurous | Blacker | Black Satan | Alien Emusa | Bemutan | Devilsaurus | Bemusa King | Speguzu | Speguzu Jr. | Dark Mander | Planetship X|