

Chameleon as he appears in Mortal Kombat: Armageddon
A master of camouflage, this ninja could take the form of any male warrior and use their powers. He first appeared as a secret playable kombatant in the Playstation version of Mortal Kombat Trilogy. While never officially stated in any Mortal Kombat game, Chameleon is believed to be of the Saurian race, which Reptile and Khameleon are both descendants.
Chameleon also made an appearance as a playable kombatant in Mortal Kombat: Armageddon. His back-story states that he has been present dating back to Liu Kang's first Mortal Kombat victory, constantly remaining hidden in the shadows, watching as events unfold. In his ending, it states that Chameleon camouflaged himself in order to reach the top of the pyramid unchallenged, and gained immortality after defeating Blaze.
Mortal Kombat: Armageddon

As the battle raged, Chameleon camouflaged himself and raced to the top of the pyramid unseen. There he defeated Blaze and the ethereal power overtook him. Immortality was now his! Though he had been ever-present throughout the crisis of the realms, from Liu Kang's first victory to the return of the Dragon King, he had remained hidden from sight, waiting for his moment to come. That moment had arrived. From this day forth, the realms will know Chameleon as the true champion of Mortal Kombat!