Street Fighter 3: 3rd Strike - Fight For The Future Codes -

Switch screen resolutions:
Hold L + Start at the Capcom logo to switch to a de-interlaced screen. Hold Y + Start at the Capcom logo to switch to a low-resolution/anti-aliased screen. To switch back to high resolution interlaced mode, hold Start + X at the Capcom logo.

Fight as Gill:
Successfully complete the game with every character. You may use continues, but not change characters. After this is done, highlight Yang and press Down or Yun and press Up.

Extra options:
Successfully complete the game with fifteen different characters with the system set at "Normal". This will not work if it is set to "Original". This will unlock an extra options menu and Gill.

Alternate costumes:
Successfully complete arcade mode with any character, then save the game. Highlight any fighter, then hold Start and press an attack button at the character selection screen to change his or her costume color.

Taunt:
Press L + R trigger to taunt your opponent.

Hint: Easy points:
When reach the bonus stages (when you must destroy things), repeatedly do your special attack. The quicker you destroy things, the more points you get.