Maskless Vega: 
While the game loads up when you select Vega, hold Light Punch, Medium Kick, Hard Punch. 

Opening the "Maniac Mode": 
In the main menu, highlight practice and press select 5 times, left, select 5 times, down, select three times, down, select, right, select, down, select 4 times. If you do it correctly, a message will pop up on your screen. 

Unlock All Bonus Games: 
At the mode select screen , highlight ''Bonus Game'' , then press Select(5x) , Left , Select(3x) , Up , Select , Right , Select(2x). 

Unlock All Hidden Characters: 
At the Mode Select, move the cursor to Bonus Game and press:
Select, Select, Up, Select, Select, Select, Select, Up, Select, Left, Select, Select, Select, Select, Select.

Unlock Sample Data: 
At the mode select screen , highlight ''Practice'' then press Select , Down , Select , Left , Select , Up , Select , Up , Select , Right , Select , Up , Select , Left , Select , Up , Select , Right , Select. The option will appear in the pause screen of ''Mania mode'' only. 

Unlock vs. Bison II: 
Highlight Bonus and press Select 13 times. Highlight Director and press Select 4 times. Highlight Bonus and press Select 13 times. Go to bonus games and you will find it there. 

Play as Garuda:
Highlight Arcade at the main menu and press this:
SELECT, SELECT, SELECT, Right, SELECT, SELECT, Down, SELECT, SELECT, SELECT, SELECT, Up, SELECT, SELECT, SELECT.