Guilala

Guilala (ギララ Girara) is the main antagonist of the 1967 science fiction film The X from Outer Space and its 2008 sequel The Monster X Strikes Back: Attack the G8 Summit. He is an alien parasite that attacks the Earth to steal its numerous amount of energy.

Appearance
Guilala is a large creature with a bulky body and strange antennae on top of its head, each ending in a circular golden tip. Guilala has pink eyes, a silver head, and dark gray skin. Guilala also has a series of horns on the back of his head which curve upwards. On his forehead is a periscope-like appendage rising out of it, which may be a third eye.

The X from Outer Space
Guilala is a species of Kaiju that are created from the explosions of stars made out of a special form of condensed energy, converted in the form of miniature spores. One UFO of an unknown alien race was converted by the spores and attacked the spaceship AAB Gamma as it approached Mars. One spore managed to stick itself to the Gamma when it returned to Earth.

On Earth, the spore consumed energy in the air and rapidly grew into the monster Guilala. He began to rampage throughout Tokyo, firing fireballs and achieving flight by turning himself into a massive orb. Guilala was ultimately defeated when jets carrying a substance known as Guilalalium coat the creature, causing him to limit his energy intake. Blocked from anymore energy, the process reverts Guilala back into a spore, and is launched into space into an endless orbit around the Sun.

The Monster X Strikes Back
Many years later, a Chinese satellite carrying Guilala's spore crash lands on Earth, releasing the alien yet again, starting his rampage from where he left off. After flattening the city of Samporo, he flies over to Hokkaidō, where a G8 Summit is meeting. At the G8 Summit the world leaders come up with plans on how to stop the creature. Their efforts go to waste, as each of their efforts unexpectedly fail when Guilala is able to overcome them: Japan attempts to draw him to a magma flow and a missile called The Vulture at him, but he eats it. Russia attempts to poison Guilala with a large syringe, but the venom only makes him "high". Britain attempts to brainwash him with a headset-like machine, but it only aggregates him further. Eventually, the president of North Korea reveals himself and plans to destroy Guilala with a nuclear missile, but Dr. Sano announces that Guilala's spores are re-energized, and if the missile hits him, the spores will spread, which will potentially create a horde of hostile Guilalas.

Meanwhile, two journalists named Sumire and Sanpei encounter a village worshiping a legendary deity called Take-Majin, who will protect humanity from an evil monster (the shine includes a carving of a monster resembling Guilala). The North Koreans launch the missile anyways, but the villagers wake Take-Majin from his sleep in the nick of time to stop the missile from hitting Guilala. Take-Majin fights against Guilala until he brings out his back blade and uses it to decapitate Guilala, killing his nemesis and saving humanity as the legend predicted.

Trivia

 * In The Monster X Strikes Back, Guilala was suit portrayed by 'Hurricane' Ryū Hariken, who previously played King Ghidorah, Battra, and Godzilla Jr. in the Heisei Godzilla film series.
 * Originally in the '70s, Guilala was meant to fight the monster Gappa.
 * Guilala was featured in a commercial for the job searching website The Ladder; several small Guilalas attempt to scare people, but fail and are later scared off by a larger Guilala.
 * Most of Guilala's rampage in The Monster X Strikes Back is recycled stock footage from The X from Outer Space. This included his attack on a power plant and almost every time he shot fireballs.