Hedorah (Smog hedorah) is a very big amorphous creature who is Grey, Black, Green, Red, and Yellow in color. It eats pollution.It has many stages: Initial Stage (a black Tadpole-like creature). Aquatic Stage (a big black flappy blob with eyes).
Landing Stage (a Torsoless and Armless big blob but with flappy legs too), Flying Stage (a UFO-shaped flying large creature that can launch toxic gases), Perfect Stage (a vaguely humanoid huge flappy toxic being with a swollen back and a large tail).