Zeiram
Zeiram is the ultimate being and virtually indestructible. In addition to being extremely powerful Zeiram can generate imperfect clones of itself to assist in battle. Zeiram also needs to assimilate other life forms in order to sustain itself, but in doing so it is thought that Zeiram can learn whatever is known by the organism being assimilated. Zeiram is not a unique creature and other versions of itself are known to exist throughout the universe. Later in the show Zeiram attempts to contact other Zeirams in order to bring them to Myce. (Source: Wikipedia)