Full combo gauge:
Complete the first five team matches in arcade mode with a hyper combo finish. Then, defeat Gouki. A selection for a full combo gauge will now appear on the options screen.

Continue attacking:
Press Start immediately after winning the match to continue hitting the defeated character.

Alternate costume colors:
Complete the game one time. Press C or Z at the character selection screen.

Speed select:
Complete the game one time. Ten different turbo settings may now be selected (from minus two stars to eight stars)

Random character select:
Highlight Magneto and hold Left on the character selection screen.

Same character on team:
Highlight Wolverine and hold Left at the character selection screen. The pointer will randomly jump between characters. Stop the pointer when it lands on Wolverine again. Any character may now be chosen more than once for the same team. Alternatively, the same character can be selected in arcade mode after the game is completed one time under the 2+ difficulty setting.
Immediate rematch:
The losing player can immediately replay the match by pressing L + R before the winning quotation appears. The word "Fight" will be spoken to confirm correct code entry.

Fight as Street Fighter Alpha 2 version of Chun Li:
Highlight Chun Li on the character selection screen. Hold Start for at least five seconds and press any button.

Fight as Gouki:
Highlight Magneto, Juggernaut, Dhalsim, or Vega and press Up at the character selection screen.

Enhanced audio:
Highlight the "Audio" selection on the options menu and press L or R. Select the new "Sharpen SE" option to enhance the sound effects in the game.

Alternate background music:
Change the "Music" selection on the options menu from "Stereo" to "Mono".

Quick credits:
Hold Start while the credits are scrolling.

Continue attacking:
Press Start immediately after winning the match to continue hitting the defeated character.

Hint: Apocalypse's moves:

Projectiles: Down,Down/Forward,Forward + Kick.
Punch: Any Punch.
Drill attack: Down,Down/Forward,Forward + Punch.
Fist Blast: Forward, Down/Forward, Forward + Punch.
Remote Laser: Fired automatically when an enemy approaches too closely.
Note: Apocalypse can only be used in versus mode, through a GameShark code.