Press [F10] to enter the options menu, then enter the configuration menu. Type
spam to enable cheat mode.
Take more damage:
Type god at the message screen. The phrase "God mode enabled" will appear.
Exit the message screen. The phrase "Sinister has changed the cheat code" will
appear at the top left portion of the screen. In this mode, fighters will
receive greater damage.
Fight as Juggernaut or Magneto:
Enable cheat mode. Enter the system menu and enable the "Boss Select" option.
Save the modified settings. Start normal game and select a fighter and block
mode. Hold all three punch buttons down (to fight as Juggernaut) or all three
kick buttons (to fight as Magneto) just before the match begins to load.
Release the buttons after the match finishes loaded.
Fight as Akuma:
Highlight Spiral, wait three seconds, press [Left], wait one second, press
[Left], wait one second, press [Left], wait one second, then highlight Iceman.
Then, press [Right], wait one second, press [Up], wait one second, press
[Left], wait one second, press [Left], wait one second. Omega Red should be
highlighted. Press [Down], wait three seconds, then press [LK] + [HP] + [HK].
Akuma fall onto the screen to confirm correct code entry.
Enable cheat mode. Enable the "Free Play" option at the system menu.
Fight in Juggernaut's stage:
Start a new game with two players, with one of the players using Juggernaut.
Allow the player controlling Juggernaut to defeat the other player. Have the
losing player press [Start]. Press [Start] on Juggernaut's face when it
appears, then have the losing player quickly press [Start] when the "Space
Port" stage appears.
Enable cheat mode and begin game play with any character. Hold all three punch
buttons to fight as Juggernaut or all three kick buttons to fight as Magneto.
Note: You cannot switch back to the original character.