Mutant Rat

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Mutant Rats
Big Rat.png
Godzilla The Series - Monsters - Giant Rat.png
Mutant Rat 5.png
Alternate names Mutant Sewer Rat[1]
Species Sewer Rat Mutations
Enemies Godzilla, H.E.A.T., Hunters
Created by Fil Barlow
First appearance Latest appearance
"Cat and Mouse" "Monster Wars: Part 2"

The Mutant Rats are giant rat mutation kaiju created by TriStar Pictures that first appeared in the 1998 Godzilla: The Series episode, "Cat and Mouse."


In the book Godzilla 1954-1999 Super Complete Works, the Mutant Rats featured in "Cat and Mouse" are collectively called Mutant Sewer Rats in English, while the largest rat that reappears in the "Monster Wars" trilogy is simply called the Mutant Rat in English, or Regenerated Mutant Rat (再生ミュータント・ネズミ,   Saisei Myūtanto Nezumi) in Japanese.[1]


The Mutant Rats have three separate types. The smallest and most abundant type of Mutant Rat is thin and covered in brown fur, while the middle-sized Rat is bulkier in its build and has bare chestnut-colored skin. The largest Rat has six green eyes that shine red in the darkness. Each rat is shown to have red eyes and a mouth full of enormous, jagged teeth.


Godzilla: The Series

"Cat and Mouse"

The Mutant Rats first drew attention to themselves after one attacked a homeless man in New York City. H.E.A.T. then began to track them down, and were attacked by a group of Rats before being chased off by Godzilla, who, as an iguana, naturally preyed on Rats. as a part of their attack plan, the humans sent a probe into their burrow, which the Rats destroyed. They were then hunted by a group of poachers, and the two groups made their way into the Giant Rats' nest, where they were able to corner the assailants, but they were buried in their burrow by Godzilla before they could cause the humans harm.

"Monster Wars: Part 1"

The largest Mutant Rat was called from wherever it had been to the Leviathan Aliens' Site Omega, where they began to put into effect their plan to use the monsters to dominate Earth.

"Monster Wars: Part 2"

On detecting the newly indoctrinated Godzilla on the island, the Mutant Rat, the King Cobra, the Queen Bee, and El Gusano Gigante all prepared to battle him. The Leviathan Aliens prevented conflict with their mind control before sending the monsters out to cause destruction in the world.


  • The smaller rats have tried to outrun Godzilla with amazing speed.
  • The smaller rats are extraordinary jumpers, being able to jump on top of short buildings.
  • The medium-sized rats have the strength to carry humans using only one arm.
  • The rats have the strength to grab humans with no sign of a struggle.
  • The larger rats are much stronger then the other two types of mutant rats.

Video games


Main article: Mutant Rat/Gallery.


The smaller and medium-sized mutant rats reuse El Gusano Gigante's roars, while the largest rat emits wild boar sounds.

In other languages

Language Name Meaning
Flagicon Japan.png Japanese ミュータント・ネズミ[1] Myūtanto Nezumi Translation of English name
Flagicon Russia.png Russian Гигантские крысы Gigantskiye Krysy Giant Rat


This is a list of references for Mutant Rat. These citations are used to identify the reliable sources on which this article is based. These references appear inside articles in the form of superscript numbers, which look like this: [1]


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