Street Fighter 3: W Impact (DC)

Fight as Gouki (Akuma):
Highlight Sean at the Street Fighter 3 Second Impact character selection screen and press Up.


Fight as Gill:
Successfully complete Street Fighter 3 or Street Fighter 3 Second Impact under any difficulty setting. Highlight Sean at the character selection screen and press Up, Up.


Fight as Yang:
Highlight Yun at the Street Fighter 3 character selection screen and press any Kick button.


Play as Shin Gouki (Second Impact Only):
To unlock him, you must: Select arcade mode, Don't lose any rounds and get
three perfects before you reach your last boss. Gouki comes out and kills
your particular final boss. You fight Gouki instead and now you must defeat
Gouki in the second round with a super finish. Gouki will then resurrect as
Shin Gouki. If you beat Shin Gouki you get to use him.


Extra options:
Unlock Gill and Shin Gouki. 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, Left, X, X, Right, Right.
Highlight the "Button Config" selection and press Left, Left, Y, Y, Right, Right.
Highlight the "Screen Adjust" selection and press Left, Left, X, Y, Right, Right.
Highlight the "Sound" selection and press Left, Left, Y, X, Right, Right.
If done correctly the "Extra Options" selection should now be unlocked.