Home world: Yapool's Dimension
First Appearance: Ultraman Ace Episode 24 "Look! A Giant Transformation in the Middle of the Night" (1972)
Latest Appearance: Ultraman Ace Episode 51: "Tomorrow's Ace To You!" (1973)
Height: 60 m
Weight: 0
Category: Choju
Affiliation: Yapool (Creator)
Mazaron Man (Master)
Yojo ("Mother")
Jumbo King (Body Part)
Mazarius Roars

Mazarius (マザリュース Mazaryūsu) was a choju from Ultraman Ace that was created by Yapool. He appeared in Episode 24.

Subtitle: Different dimension Super-beast (異次元超-獣 I jigen Chōjū)



Ultraman Ace

Mazarius was one of Yapool's choju which he created by using a pregnant woman named Yoshiko and turning her into Yojo. Yojo performed a ritual to create Mazarius, who then terrorized the area. All of TAC's attacks were proven futile due to the monster not entirely existing. When a TAC member was about to shoot Yojo, Kenta, who was her son, defended her. Angered at his mother turning evil, he took a stone that he brought along which was the source for all of the trouble and threw it to her, reverting Yojo to normal and thus deleting Mazarius from existence.

In the final episode of Ultraman Ace, Mazarius, along with Mazaron Man, Cowra and Unitang returned as ghosts, and were combined into the powerful choju Jumbo King by Yapool.


  • Mazarius' suit is a modified Sabotendar suit.
  • Mazarius' roars are modified baby cries.
  • Despite ceasing to exist instead of actually dying, Mazarius was incorporated into the body of Jumbo King.
    • This might due to it being the "child" of Yojo.

Powers and Weapons

  • White Smoke: Mazarius can shoot a white cloud of smoke from its mouth.
  • Intangibility: Mazarius itself was intangible, enabled it to prevent attacks.


Mazarius's life force was linked to Yojo's maternal energy. If the woman reverts to normal, Mazarius will cease to exit.


Ultraman Ace Kaiju & Seijin
Verokron | Yapool | Chameleking | Vakishim | Garan | Aribunta | Giron Man | Brocken | Alien Metron.Jr | Doragory | Muruchi II | Gammas | Zaigon | Alien Antira | Unitang | Sabotendar | Barabba | Ace Killer | King Crab | Cattle God | Cowra | She-Devil | Hotarunga | Black Pigeon | Android Couple | King Kappa | Zemistlar | Aprasar | Aprasar Fairy | Space Mask | Black Satan | Giant Yapool | Mazaron Man | Yojo | Mazarius | Alien Orion | Sphinx | Alien Hipporito | Lunaticks | Undergroundmon | Gitagitanga | Red Jack | Baktari | Coakes | Bad Baalon | Kaiteigagan | Dreamgillas | Soundgillar | Machless | Snowgiran | Namahage | Alien Fire | Firemons | Alien Steal | Kaimanda | Shishigoran | Iceron | Woo II | Fubigirara | Onidevil | Gasegon | Daidarahoshi | Hanzagiran | Verokron II | Yapool Woman | Univerlages | Aquarius | Alien Revole | Signalion | Geegon | Alien Simon | Jumbo King