Hedorah is a giant enemy Kaiju in the Godzilla universe. Hedorah is categorized as a pollution alien that arrived on Earth in a comet. Hedorah grew into his giant sized form by feeding on the Earth’s pollution and battle Godzilla on Japan’s shores. Hedorah is considered one of Godzilla’s most difficult enemies where Hedorah was able to deal massive damage to Godzilla. Hedorah met his defeat in the combined efforts of both Godzilla and humanity.