Play as a student:
     At  the  character  selection screen, hold L1 + L2 + R1 + R2, and
choose  a  character.  You  will  get  a  different  student  for each
character you choose.

Confuse the enemy:
     If  you  keep  on pressing X and Circle at the same time, it will
confuse  your  enemy  on  whether or not you'll attack or not (only in
versus mode and possibly tournament).

Hidden characters:
     When  you  have  become  "Master  of  Bushido" in "singel player"
(thats  wen  you have completed the game). Go to "tournament" and hold
down  L1 + L2 + R1 + R2, and choose any character. You will be able to
play  as a hidden character. If you havent finished the whole game you
will become a student.