A species of kaiju created by the explosions of stars, Guilala was made out of a special form of condensed energy normally found in little contained spores. An unknown alien race once attached spores to a space ship from Earth. One spore was carried back and the guilalium was taken off. The spore broke open and Guilala came out and grew to monstrous proportions! It destroyed most of Japan in the search for energy. Lured by powerful nuclear energy to the Mt. Fuji spaceport, but was covered in guilalium. Blocked from the energy all around, Guilala became a spore again, and was sent on a rocket to orbit the sun forever.
Like a lot of kaiju, most human defenses just bounce right off of him. However, he seems to be a bit better at blocking attacks then most kajiu. He once demonstrated these skills when taking a direct hit to the head by a kamikaze jet without even flinching. Not only does he have strong defense, but strong offense. His striking skills are average, but he does have some original attacks. He can launch fireballs out of his mouth, absorb energy to become stronger, and even turn into a ball of energy to move from one place to the other while destroying everything around itself. Even though he has strong attacks and a tough hide, he is still very fast.
The X from Outer Space (1968)
The Monster X Strikes Back/Attack the G8 Summit (2008)