Codes:
Clean Pause - Pause the game and press and hold Y,and X.If you entered the code correctly,the screen wont darken and the word pause will not appear on the screen.

Play as Evil Morrigan - Put the cursor on Zangief and enter the following: Left, Left, Down, Down, Right, Right, Up, Up, Down, Down, Down, Down, Left, Left, Up, Up, Up, Up, Right, Left, Down, Down, Down, Down, Right, Down, X

Play as Evil Zangief - Highlight Zangief and execute a down-to-back quarter-circle on the d-pad and a kick.

Play as Orange Hulk Put the cursor on Chun-Li and press: Right(x2),Down(x2),Left(x2),Right(x2),Down(x2),Left(x2),Up(x4),Down(x2),Right(x2),Up(x2),Down(x4),Up(x4),Left,Up

Play as Red Venom Put the cursor on Chun-Li and press Right,Down(x4),Left,
Up(x4),Right(x2),Down(x2),Left(x2),Down(x2),Right(x2),Up(x4),left(x2),Up

Play as Roll Highlight Zangief, then press left, left, down, down, down,down,right,right,down,down,left,left,up,right,up,up, right, right.

Play as Shadow Lady Move the cursor over Morrigan and enter the following: Up, Right, Right, Down, Down, Down, Down, Left, Left, Up, Up, Up, Up, Right, Right, Left, Left, Down, Down, Right, Right, Down, Down, Left, Left, Up, Uo, Left, Left, Down, Down, Down, Down, Down, X

Select Anita As Your Partner After selecting your two characters, hold start, weak punch, medium punch and high punch and you will select Anita.

Select Arthur As Your Partner After selecting your two characters, hold start, weak punch + medium punch and you will select Arthur.

Select Colossus As Your Partner After selecting your two characters, hold start, weak punch, medium punch and medium kick and you will select Colossus.

Select Cyclops As Your Partner After selecting your two characters, hold start, weak punch, weak kick and medium punch and you will select Cyclops.

Select Devilot As Your Partner After selecting your two characters, hold start and medium punch and you will select Devilot.

Select Iceman As Your Partner After selecting your two characters, hold start, medium punch and medium kick and you will select Iceman.

Select Jubilee As Your Partner After selecting your two characters, hold start, weak kick, medium punch and high punch and you will select Jubilee.

Select Juggernaught As Your Partner After selecting your two characters, hold start, weak punch and medium kick and you will select Juggernaut.

Select Lou As Your Partner After selecting your two characters, hold start and medium punch and you will select Lou.

Select Magneto As Your Partner After selecting your two characters, hold start, weak kick and high punch and you will select Magneto

Select Michelle Heart As Your Partner After selecting your two characters, hold start, weak punch and weak kick and you will select Michelle Heart.

Select Psylocke As Your Partner After selecting your two characters, hold start and medium kick and you will select Psylocke.

Select Pure and Fur As Your Partner After selecting your two characters, hold start and weak kick and you will select Pure and Fur.

Select Rogue As Your Partner After selecting your two characters, hold start, weak punch, weak kick, medium punch and high punch and you will select Rogue.

Select Sentinel As Your Partner After selecting your two characters, hold start, medium punch, medium kick and high punch and you will select Sentinel.

Select Shadow As Your Partner After selecting your two characters, hold start, weak punch, medium kick and high punch and you will select Shadow.

Select US Agent As Your Partner After selecting your two characters, hold start, high punch and medium kick and you will select US Agent.

Select Saki as your helper character After selecting your two playable characters, hold Start and High Punch

Select Storm as your helper character After selecting your two playable characters, hold Start, Light Punch, Light Kick, and High Punch

Select Ton-Pooh as your helper character After selecting your two playable characters, hold Start, Light Punch, and High Punch

Select Unknown Soldier as your helper character After selecting your two playable characters, hold Start and Light Punch

Select Thor as your helper character After selecting your two playable characters, hold Start, Light Kick, and Medium Punch

Alternate costumes:
Highlight any fighter, then press A or Y buttons at the character select screen.

Play as Onslaught:
To play as Onslaught, successfully defeat each of the secret characters in arcade mode, saving then to a memory card. Once all the secret characters have been enabled, the Onslaught mode will open up on the the title screen, enabling player 1 to play Onslaught either with a second player or the CPU.

Perform Moves after KO:
After you win the match and are in your victory stance, press START to gain control your character and perform moves. NOTE: You can not do this if you have KOed your opponent while both of your characters are on the screen

Attack Opponent:
After Winning a Match After you win a match and your character does his/her victory pose, press Start. You'll be able to attack your fallen opponent while he/she is down.