Enter the option screen of either game and hold L + R. Keep those buttons held until the extra options appear at the end of the code. Highlight the "Game Option" selection and press Left(2), X(2), Right(2). Highlight the "Button Config" selection and press Left(2), Y(2), Right(2). Highlight the "Screen Adjust" selection and press Left(2), X, Y, Right(2). Highlight the "Sound" selection and press Left(2), Y, X, Right(2). If done correctly, the "Extra Options" selection should now be unlocked.
First you have to go to practice mode and pick Akuma (Press up on Sean and Akuma's face will appear). Then pick for his super art Messatsu-Gouhadou . Then when the fight begins press start. Then highlight gauge and put it to maximum then highlight guard and put it to no guard. Now here is the hard part,if you are not good at timeing your attacks you cant do this. Do his super art then right after that do his version of a hadoken . Repeat the procces until you cant do it any more. You might be able to get over 29 hits if you are fast.
Pause the game and press X + Y.
Reach the final boss in Street Fighter 3: Second Impact without loosing any rounds and getting a perfect at least three times. Then, defeat Gouki with super arts or a perfect and Shin Gouki will appear. Finally, defeat Shin Gouki to unlock him. To play as Shin Gouki, highlight Gouki at the character selection screen, then hold Start and press any punch or kick button.
Successfully complete Street Fighter 3: New Generation or Street Fighter 3: Second Impact on any difficulty setting. Then at the character selection screen, highlight Sean and press Up(2).
At the Street Fighter 3: Second Impact character selection screen, highlight Sean and press Up.
At the Street Fighter 3: New Generation character selection screen, highlight Yun and press any Kick button.
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