Altered Beast.

 No.  Code  Effect
   1  DCXA-AA22  MASTER CODE--MUST BE ENTERED
   2  FT1T-AA5L  Infinite lives
   3  BWXA-ACCT  Start with 1 life
   4  BWXA-ALCT  Start with 5 lives
   5  ATWA-AA8R  Protection against enemy hits
   6  PA5T-BNT2  First spirit ball transforms you into an Altered Beast
   7  AEFA-AABW  Makes Aggar easier to defeat
   8  AA9A-ALN8  Most Altered Beast punches are more powerful against bosses  
   9  AA9A-ALPG  Most Altered Beast attacks are more powerful against bosses
 DOES NOT WORK FOR BEAR  
 10  HTWT-B6KG  Makes most enemies easier to defeat
 11  A2TA-AAGC  Makes Neff easier to defeat
 12  AYMT-AAHN    Makes Crocodile Worm easier to defeat