Batman: Rise Of Sin Tzu
All Bonuses
Pause the game, then hold L1 + L2 + R1 + R2 and press Down, Up, Down, Up, Left, Right, Left, Right.
All Upgrades
Pause the game, then hold L1 + L2 + R1 + R2 and press Up, Up, Left, Left, Right, Right, Down, Down.
Dark Knight Difficulty Setting
Pause the game, then hold L1 + L2 + R1 + R2 and press Down, Left, Right, Up, Up, Right, Left, Down.
Unlimited Combo Meter
Pause the game, then hold L1 + L2 + R1 + R2 and press Left, Right, Up, Down, Right, Left, Down, Up.
Unlimited Health
Pause the game, then hold L1 + L2 + R1 + R2 and press Up, Right, Down, Left, Up, Left, Down, Right.
The database at Game Oak contains more information regarding Batman: Rise Of Sin Tzu for Sony PlayStation 2.