Jack

The original Jack is a super slaughtering military machine and super killing robot developed by the former Soviet Union. The Russian military got wind of Kazuya's world coup d'etat plans right away and sent Jack to the tournament to get rid of him. Nothing but a robot could boast of his violent attacks and stupendous power.In his ending, Jack is strapped onto a machine. More Jacks are shown being activated. The scene ends with metal doors closing, which say "Danger".The original Jack is the rival of Prototype Jack.