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.