Doras

"From Kamen Rider ZO".

Doras ( ドラス ):
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A pool of living fluid that relies on the very container its dwells in as its lifesupport. It took on the appearance of a deformed little boy in Hiroshi's likeness. The Neo Organism orchastrated the events in the movie, and even overpowered its creator, Doctor Mochizuki who tried to reason with it. It soon assumed the grotesque grasshopper humanoid form of Doras to find Hiroshi to force Dr. Mochizuki to complete its evolution into the "Perfect Lifeform" so it can destroy the "inferior" human race. Doras is capable of regenerating itself from severe injuries, absorbing inorganic and organic materials to upgrade itself or alter its form into an orb or a bladed projective. When Doras manage to absorbed ZO, it became a red fleshy version of itself. It then went for Hiroshi, but the music from the pocket watch managed to give ZO the strength to break free from Doras' body after Mochizuki destroyed its power source. Reverted to its normal state, Doras was finally killed.

(c)Toei