The Mimic is a shape-shifting monster that appeared in Godzilla: The Series.
In its natural form the creature is a gelatinous grey mass of flesh. If it encounters another lifeform and makes physical contact it can assume that creature's form through genetic sampling.
Created by a French Scientist who eventually became "Unsound", according to Philip the creature was created as part of a hybridization experiment. Its original purpose was to facilitate the hybridization process of combining DNA to create new lifeforms. However the creature soon developed a mind of its own and was sealed in a drum and abandoned in the Amazon.
It was accidentally released by a treasure hunter years later and began roaming the jungle in search of its counterpart so it could replicate itself. H.E.A.T. was soon alerted of the situation and went to the lab to kill the creature, unaware that it had capture Monica and was impersonating her. It soon was able to cause dissension among the members of H.E.A.T. because they no longer knew who was real and who wasn't. However, the creature had a higher body temperature than the original, therefore they were able to expose its cover. It mimicked Elsie, turning into a giant, two-headed copy after being hit by the anti cellular harpoon dart. By measuring each creature's body temperature, Nick was able to discover which was the mimic, and was able to kill it.