First off, the sequel to Battle Arena Toshinden, BTA 2 contains 4
extra  playable  fighters:  2  are  bosses  and  the others are secret
fighters. They are Vermillion, Sho, Master and Uranus respectively.

Master and Uranus:

     Press  this combination very quickly as the words are coming from
the  left side of the screen. The best way to do it is to restart, and
just  after the screen goes blank, quickly press the combination below
(Keep trying, it takes a while to get it right):

     R1,  L2,  WK, L1, R2, SK - You should hear a sound and the cursor
turning blue to indicate that it worked.


Vermillion and Sho:

     Do  the  code  above  first,  then  repeat  the process with this
combination instead:

     SK,  R2,  L1,  WK, L2, R1 -- U should also hear a sound, with the
cursor turning from blue to red this time.

Pictures:
     Start  any  type  of  game.  Goto  the "?" box and hold the taunt
button to slow down the selection process. U should see their pictures
there, so enjoy!