Auto Win
This code is very simple, and it works with every player in the game except Purge. All you do is start the arcade mode, then when you fight, pause and do as follows:
1. Go to the disables menu
2. Turn off shields
3. Go back to the game and do nothing but fire!
I was amazed myself when this turned out working. The only thing you have to watch out for is when Mutilater (the bad guy) shoots into the water. You have to get out quickly and keep firing, because there are parahnas in there that will eat you.
Creation Date
To check when your copy of Bio F.R.E.A.K.S. was created, quickly press the left C-Button immediately after you turn your system on (press it rapidly a few times to increase your chances). But you must stop pressing the button in order to view it. You will know if it is done correctly by the sound of someone laughing.
First Person View
To switch into a first-person fight view press and hold left on the digital pad and then press the Start button. To switch back, press and hold down on the digital pad and then press the Start button.
Screen Saver
Pause the game and wait a few minutes until a screen saver will show up.
Taunt
To make any character in Bio Freaks taunt at there opponet simply press LP and RK at the same time and then watch your character taunt his/hers opponent.