Cheat mode
Press [F10] to go into the options menu, then go into the configuration menu. Type spam to enable the cheat mode.

Fight as Akuma
first 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. Now Omega Red should be highlighted. Press [Down], wait three seconds, then press [LK] + [HP] + [HK]. Akuma will fall onto the screen to verify entry.

Unlimited continues
First enable cheat mode. Next eable the "Free Play" option at the system menu.

Triple team
First enable cheat mode and start to 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 go back to the original character.

Take more damage
Just type god at the message screen. The phrase "God mode enabled" will then appear. Exit the message screen. The phrase "Sinister has changed the cheat code" will appear at the top left portion of the screen. While in this mode, fighters will receive greater damage.

Fight as Juggernaut or Magneto
First enable cheat mode. Go into the system menu and enable the "Boss Select" option. Save the changed settings. Start a normal game and select a fighter and block mode. Hold all three punch buttons down or all three kick buttons just prior to the match starting to load. Release the buttons after the match is totally loaded.

Fight in Juggernaut's stage
Begin a new game with two players, with one of the players using Juggernaut. Then allow the player controlling Juggernaut to beat the other player. Have the player that lost press [Start]. Next press [Start] on Juggernaut's face when it appears, then have the losing player press [Start] when the "Space Port" stage appears.