When you are in the character selection screen. Select Team Edit and 
enter this code: Up,Square,Right,O,Left,Triangle,Down,X and Omega 
Rugal and Saisyu Kusanagi should appear.

To Reset:
Anywhere in game press t+c+s+x+sel and you'll return to the main screen.

Special Ending:
There are two special endings the first one is finish the game whith the
pshyco soldier team second way is finish it on level 8 with on continues.

To turn on options for ending sequences:
Go to options screen and press L1 + L2 + R1 + R2. In the configuration mode 
will be a new option to turn off winning poses after a fight.