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Gundarguirus (ガンダーギラス?) is a GandāgirasuTerror-Beast kaiju created by Toho that first appeared in episode 18 of the 1973 tokusatsu kaiju series, Zone Fighter titled Command: "Destroy the Japanese Islands".
Gundarguirus is a bizarre creature which appears to be a chimera of various species. His head resembles that of a walrus with red tusks.
Gundarguirus was used by the Garogas as a makeshift bomb. After Professor Tanzawa discovered a powerful energy source that he named PS73, the Garogas managed to infiltrate his laboratory and steal the sample, which they then fed to Gundarguirus. It was then discovered that a comet was approaching the Earth, and that if the comet came too close, the PS73 within Gundarguirus would explode, destroying Japan entirely.
- Gundarguirus can fire a stream of fire from its mouth.
- Gundarguirus can fire two thin red beams from each of its two fangs. After colliding with an opponent, the beam will raise them into the air and spin the opponent at high speed, disorienting them.
Gundarguirus uses edited Bemstar cries.