What Mortal Kombat character was created based off of widely circulated rumors, but was actually an unintentional error code in the original arcade version?

In 1991, Midway Games produced a fighting arcade game that would be available in ten months. With three other people, Midway programmer Ed Boon, then 27, and comic book artist John Tobias, then 22, worked on the project. Before the game was released, the team was able to conceptualize and construct the first version.