Tekken 7 welcomes Tekken favorite robot Jack 7 to join the fight. Jack is all strength with assist of robotic part like fists that can be uses as Jack hammers his guns as bullets. His look is different as he now has glowing green lines on the top of his body on his skin. I suppose this shows him a robot. He still has the same movement though. You can see this in the video below. Tekken 7 is the fight that will settle things between Kazuya and his Heihachi.
Article:http://www.animenewsnetwork.com/news/2015-05-15/tekken-7-fighting-game-adds-jack-7-to-roster/.88190
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