
Two mutations fighting Godzilla in issue 2.
The following article is solely a page of various mutations/aliens that made an appearance in Marvel's run of Godzilla: King of the Monsters, all which are unnamed. They play no major role, as they only appear in flashbacks or overconfident imagery.

Three non-existent monsters in Godzilla issue 5 as Dr. Demonicus rambles about conquering the world.

An "Alien Dinosaur" that briefly appears in Godzilla issue 12.

Two other alien monsters in Godzilla issue 12.