Kitana and her evil sister Mileena were added to Mortal Kombat 2 mainly to compete with Chun-Li in Street Fighter as they wanted a strong and sexy female character.

Sonya Blade wasn’t a playable character in Mortal Kombat 2, but she did show up as a prisoner of Shao Kahn in a stage.

Kano was one of the original playable characters from the first Mortal Kombat that was cut for the second game. He appears as a prisoner in one of the stages.

The secret character Noob Saibot in Mortal Kombat is just the last names spelled backwards for the co-creators of Mortal Kombat, Ed Boon and John Tobias.

There was a rumor that Scorpion in Mortal Kombat could turn red with a glitch dubbed “error macro.” The rumor turned out to be false but it did inspire Mortal Kombat creators to make Ermac, an actual character in Mortal Kombat 3.