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Burn up in gray flames
I found a cool but useless trick. Play a one player game until you get to the endurance matches. At the third endurance match, pick Raiden as your fighter and fight the rounds. When it says Finish Him, perform the electricution fatality (right, right, left, left, left, B). The opponent will burn up, but in gray flames! Then Goro will jump down, but his skin color will turn gray too!