EX menu
Highlight the "Options" selection at the main menu, then quickly press R1, Circle, Left, Triangle(2). For the Japanese version of the game, quickly press L1, X, Left, Square(2) at the main menu. -From: frost58 @ hotmail.com

Play as Armored Spider-Man
At the character selection screen, highlight Spider-Man, hold Select and press any Punch or Kick button. -From: spazz @ shaw.wave.ca

Play as Mephisto
At the character selection screen, highlight Omega-Red, hold Select and press any Punch or Kick button. -From: spazz @ shaw.wave.ca

Play as U.S. Agent
At the character selection screen, highlight Vega (M. Bison), hold Select and press any Punch or Kick button. -From: spazz @ shaw.wave.ca

Play as Shadow Charlie
At the character selection screen, highlight Dhalsim, hold Select and press any Punch or Kick button. -From: spazz @ shaw.wave.ca

Play as Dark Sakura
At the character selection screen, highlight Hulk, hold Select and press any Punch or Kick button. -From: spazz @ shaw.wave.ca

Play as Grey Hulk
Enable the "Play as Dark Sakura" code and choose Hulk as her partner. Note: This color code should be universal for all characters.

Play as Mech-Zangief
At the character selection screen, highlight Blackheart, hold Select and press any Punch or Kick button. -From: spazz @ shaw.wave.ca

Play as Cyber Akuma (American version)
Beat the game with any character without continuing. Then at the character selection screen, highlight Akuma, press Select(5), then press any Punch or Kick button. -From: gohan4791 @ earthlink.net and Supermn725 @ aol.com

Play as Apocalypse (American version)
Beat the game with any character without continuing. Then at the character selection screen, highlight Akuma, press Select(6), then press any Punch or Kick button. -From: gohan4791 @ earthlink.net and Supermn725 @ aol.com

Play as Mech-Gouki (Japanese version)
Beat the game once with any character. Then enter the options screen and select "Same Character Mode". Now on the character selection screen in arcade or versus mode, highlight Gouki (Akuma), hold Select and press any Punch or Kick button, then select Gouki again and press any Punch or Kick button. -From: SkApUnK330 @ aol.com and FLybOyiTri @ aol.com

Play as same character (Japanese version)
Beat the game once with any character. Then the same character may be chosen by both players on the character selection screen.

Bonus options (Japanese version)
Beat the game without losing any rounds. Then, additional selections will appear on the options menu, including increasing the speed to eight stars and always having full combo meters.

Switch starting character
Select your characters, then hold L1 + L2 + R1 + R2 before the "Now Loading" screen appears. Then when the match begins, the second character you chose will be the starting fighter. -From: Meltonm @ cepb.com