Monster of the Day: Ghidrah

Source:  Godzilla movies
Location:  Outer Space and Earth
Threat Assessment:  8.  Easily Godzilla's greatest all around foe.  Ghidrah is bigger than Godzilla, can fly and has three heads.  Each head has a long neck, sharp teeth, and can shoot out lightning.  It can take out whole cities without much effort.  Later in the series it got a cybernetic upgrade to make it even more deadly.
Limitations:  Not many.  Sometimes its heads can be confused.  It can be mind controlled.  Mostly it's only weakness is a good Godzilla Beating.