Films: Godzilla Vs. Hedorah (1971)
Alias: Smog Monster, Hedoron, Hedrah, Hedora, Hydrox, Gomi
Location: Ocean/Civilized area
Height/Weight: 60 meters and 48,000 metric tons.
Affiliation: Neutral, leaning on Evil
Summary: To the hundreds of people saying that those who preach about not polluting and/or preserving the Earth are a bunch of wingnuts and idiots, we point you in the direction of this horrible thing. This kaiju quite literally made of unnatural death. But Captain Planet wasn't invented yet, so Godzilla had to intervene.
History: Coming on a comet from a dark nebula in space, Hedorah started out as a simple tadpole before growing into an aquatic beast turning the bay into a sick wasteland. A while later, he was gassing up the city and killing hundreds with his presence alone. Needless to say, even with Godzilla coming over, things were going to get...messy.
Notable Kills: You look at those people getting turned into bones by Hedorah's noxious gasses and tell me you want to go near him.
Final Fate: Eventually, Godzilla manages to force Hedorah to stand between two electrodes, burning the giant into submission. Cue big G eviscerating the monster and burning all of his organs so that we don't have another smog monster.
Powers/Abilities: Hedorah can change shape and adapt to almost any environment, even the skies with a smaller flying form. In this form, anything below him gets a good whiff of his sulfuric gasses, which can eat away at a person all the way to the bone. He can also spread acidic sludge and fire a red searing laser from his eye. And if his dead body has enough time by itself, he can revive.
Weakness: Electricity. His body must be completely burnt inside and out to prevent revival.
Scariness Factor: 4.5-Hedorah both feeds off and spreads what makes environments completely inhospitable to all. Those who suffer from his antics tend to die horrible, agonizing deaths. And on top of that, his roars are unnerving as Hell.
Trivia: -Hedorah's name is derived from the Japanese word for sludge, "hedoro".
-Apparently, the original suit weighed up to 100 kilograms.