Gigan

Gigan is a monster in Toho's cannon of Godzilla creatures. He works as a sort of "kaiju bounty-hunter," and is usually employed or controlled by different races of alien invaders, most often to team up with other giant monsters.

Phfrogg

Phfroggs are strange amphibian mutants which have sprung up around the Japanese Fukishima nuclear power plant. The creatures grow to a height of 2 feet at the top of their heads, although specimens of up to twice that have been observed. The creatures are voracious eaters, and have been blamed the depletion of nearby fisheries.

Devil Wirm

Devil Wirms are aerial parasitic creatures which infest the pungent marshes and waste holes of Hell's lower levels. They tend to attack in large swarms, and will cover an intruding creature from head to toe to quickly drain it of all bodily fluids.

Gremlins

Gremlins are supernatural creatures to whom mechanical malfunctions are attributed. During World War II air force pilots often blamed such technical difficulties on sabotage from the Gremlins. They were attributed a large number of disruptive abilities, such as the ability to siphon off fuel, cause instruments to give false readings, or raise and lower the runway by ten feet.

I imagine that modern gremlins have probably gone on to destroy and dismantle the wide variety of computers, video game systems, and other types of consumer electronics.

Gnockerbe

Gnockerbes are strange, dog-like mutants that have appeared in Australia's outback. It is believed that illegal dumping of toxic radioactive waste gave rise to the strange creatures, who seem to be an offshoot of local Dingo populations. The weird, tentacle like legs make for slow overland speeds, but allow the creatures to quickly scale trees and climb rocky surfaces.

Titanosaurus

Titanosaurus is a monster from the Toho series of Godzilla films.

Enjoy!

Grolshlemin

Grolshlemins are bizarre, mutant Gremlins, horribly transformed after long term exposure to nuclear waste. Like normal gremlins, they enjoy causing havoc and destroying machinery, but their exposure to radiation have given them immunity to sunlight.

Kallikantzaros

In Greek mythology, the Kallikantzaros is an evil, goblin like creature. They remain underground and saw the roots of the world tree, so that it will eventually collapse and destroy the earth. During the Christmas season they come to the surface to cause trouble for mankind.

Leviathan

The Leviathan is the primordial sea monster who God finally slays during the battle of Armageddon. Leviathan is described as a massive serpent which lives under the "sources of the deep." Myths of sea serpents and dragons are common to many of the religions of the Middle East.

Overlord Demons

A race of demons specifically bred by the higher Demon lords to act as lower level captains, slave masters, or work bosses. They are sufficiently intelligent enough to boss around those lower than themselves, but lack the will to make important decisions. They are bred for their size and strength, and tend to rely on brute force in any situation.