Jade

Jade's introduction to the Mortal Kombat series is quite similar to that of Reptile's. (In the first Mortal Kombat, Reptile made his appearance as a green-colored version of Scorpion with both Scorpion and Sub-Zero's abilities.) Making her first appearance in Mortal Kombat II, she was a hidden, unplayable character that was simply a palette-swap of Kitana but which was extremely fast and who could not be harmed by projectiles. In most ports of MKII, she had brown skin (except for Sega Genesis/Megadrive, and Sega Saturn where she had Kitana's skin color). Jade's name was not superimposed over her MKII energy meter; its inclusion was likely forgotten by the programmers during production.