When you play the full version of Alpha 3 you can play as these additional fighters: Evil Ryu, Fei-Long, Guile, Juni, Juli, T. Hawk, Barlong and Dee Jay.
Alpha 3: Shin Akuma/Super Gouki
At the character selection screen, highlight Akuma, hold start, and press x, triangle, square, circle, R1, R2, L2, or L1. Note: this will only work in the full version of Alpha 3.
Alpha II: EX Characters
There are 3 EX characters in STA2. To play as one of them, select the Full Version of Street Fighter Alpha II. Then go to the character selection screen. Hilight one of these people below and follow the directions.
EX Chun-Li: Hilight Chun-Li and hold Start for 5 seconds.
EX Zangief: Hilight Zangief, hold Start and press Down, Left(4), Up x2, Right(4), Down, X
EX Dhalsim: Hilight Dhalsim, hold Start and press Left, Down, Right, Up, X
Arrange Mode / Full Version
To unlock the full version of Alpha 2:
Complete Arcade Mode without continuing then exit out. Highlight Alpha 2, Hold SELECT + press X.
Repeat above for Alpha 2 Gold and Alpha 3.
Note: There are no full versions for Alpha 1 and Super Gem Fighter Mini Mix.
Chun-Li's Original Outfit in Street Fighter Alpha 2
At Player Select screen
Hold Start and move cursor over Chun-Li
Leave cursor on Chun-Li for 5 seconds
Press the following buttons for these colors
Any P: Blue All P: Green Any K: Pink All K: Black
Color Edit
In any of the games, go to options and highlight "display adjust", and hold R1, and press x. Note: Color Edit is where you can make and customize costumes for any character you choose.
Dramatic Battle Survival Mode
In all SFA games, select Dramatic Battle and QUICKLY hold down triangle + R2 to enter Dramatic Battle Survival Mode. You will face opponants in the same order as Survival Mode and will continue fighting until both you and your partner are KO'ed.
Fight Akuma instantly in Street Fighter Alpha 1
To fight Akuma instantly without fulfilling any in-game requirements, hold the Start button and select arcade mode in Street Fighter Alpha 1. Select your character and any additional options (such as Turbo) while still holding down start. Immediately after, press and hold Medium Punch and Medium Kick buttons (Triangle and Circle) while still holding down the start button until Akuma appears. You have to be very quick into pressing Medium Punch and Kick after selection. Do not press any shoulder buttons until Akuma appears or you may invalidate the code. If done right, Akuma will do a Shun-Goku-Satsu on your 1st opponent and you get to fight him next.
Fight Shin Akuma instantly in Street Fighter Alpha 2 Gold
Press and hold Medium Punch and Medium Kick (Triangle and Circle). Select arcade mode and press start in SFA2 Gold's main menu. If done correctly, the character selection screen will be colored blue rather than orange. Pick any character and get ready to fight Shin Akuma.
Final Battle mode in Street Fighter Alpha 3
To fight your end boss instantly (usually M.Bison) in Street Fighter Alpha 3, select arcade mode. Select any character and all additional options (such as Turbo and ISMS). Immediately after, press and hold Start, Light Punch, Medium Kick and Hard Punch until M.Bison appears on the vs. screen. You must be very quick into doing this or the code might not work. Convenient for people who lost to M.Bison in regular arcade mode and can't continue.
More Options
In any of the games, go to options and highlight game options, hold R1 and press x. These are options such as health recovery.
Play as Akuma or Dan in Pocket Fighter
On the character select screen to choose Dan press right from Ken and to choose Akuma press left from Ryu.
Play as Cammy in Street Fighter Alpha 2 Gold
When at the character select screen, go to Bison (Vega), press start twice and Cammy will appear for selection. She can be used in all modes.
Play as Evil Ryu in Street Fighter Alpha 2
Go to Ryu and hold Start for 1 second
Then go to Adon, Akuma, Adon, and back to Ryu
Press and hold Start then press any button
Play as Shin Akuma in Street Fighter Alpha 2 Gold
Highlight Akuma and Press Start 5 times.
Secret Stages in Street Fighter Alpha 2
Can only be done in 2 Player Mode
GRASSY AREA
At Player Select screen
Either player press and hold Start
Move cursor to Sagat, leave it there for 5 seconds
Go to any character, release Start, and press any button
WATERFALL
Do the same code as above but use Bison instead of Sagat
SFA Cheats
Play as Vega (Bison): Highlight the random box at the character selection screen, hold START and press DOWN x2, LEFT x2, DOWN, LEFT, LP + HP.
Play as Akuma (Gouki): Highlight the random box at the character selection screen, hold START and press DOWN x3, LEFT x3, LP + HP.
Play as Dan: Highlight the random box at the character selection screen, hold START and press LP, LK, MK, HK, HP and MP.
Shadaloo Mode
In Street Fighter Alpha 3 Arrange mode, When you are selecting your style (Normal, Mazi, Saikyo, and Classic) Hold Start on Classic, then press down. The cursor should dissapear. Now press any button. This is M.Bison's Special bar during the last fight, for any character, referred to as Z-Ism.
View Credits For Street Fighter Zero Fighters Generation
To view the credits for Street Fighter Zero Fighters Generation, you must have all the games unlocked (even all arrange versions) including Hyper Street Fighter Zero.
To get to the credits staff roll, highlight Street Fighter Zero 1 from the main menu and press Select + any button you use to select it (the main buttons that confirms a menu choice) then once your in the choices for game modes at Hyper Street Fighter Zero go to Options, and hit the R1 button plus the confirmation button and you will see the staff roll (credits) for Hyper Street Fighter Zero.