Monster of the Day: Gigan

Source:  Godzilla Movies
Location:  Outer Space when not attacking Earth
Threat Assessment:  6.  He was never the heavy weight that Ghidrah was though he certainly was rotund enough.  Gigan could fly and survive in outer space.  Was as tall as Godzilla and heavily armored.  He is armed with huge claws (well actually just one claw at the end of each arm forming a wicked hook), a chain saw belly, and an energy blast.  He was later updated and cyborged up with twin skyscraper sized chainsaws and even more energy weapons.
Weaknesses:  Nothing really.  Except like everything else in the universe he's not Godzilla Proof.