Select the Code Entry option at the Extras menu, then enter one of the following codes to activate the corresponding cheat function:
Infinite health
Enter 94677 as a code.
Infinite stealth
Enter 53467 as a code.
Infinite copper
Enter 23637 as a code.
Infinite Chi
Enter 24463 as a code.
Double damage
Enter 34743 as a code.
One-hit dishonor
Enter 54641 as a code.
All treasure maps
Enter 37437 as a code.
Character concept gallery
Enter 97831 as a code.
Defeating the fire machine
This is the machine you must fight in order to find Katara. Dodge the fire bending. Try running left to right, then right to left. Continue this until you see a flashing light near it, then attack it. Hit it with Aang. You may use a Chi attack but just a plain attack should work just as well, however it takes time. You will have Saka (Katara's brother) fighting with you to do double damage. Once it has around a quarter of its HP gone, the machine will start throwing fire around. Keep a safe distance from this attack. It causes no real threat to your or your partner as long as you stay as far away as possible.
Easy experience
Whenever you are in battle you can go back later to get more experience.
Infinite Health
Enter the following code with the CodeBreaker PS2 to have Infinite Health:
93FD6304 FF42173C
06B0ADA9 F7303EFA
Level Art Gallery
Collect all Set Items through level 3.
Max Codes
Enter the following codes with CodeBreaker PS2 to unlock the corresponding 'Max' effect:
Max Health: 0E1B3312 3FDCE7C6 85C48F05 CA7BA95A
Max Chi: 91B3626B EE1388FB CDCA5FE9 9D2C5D48
Max Armor: 50B4995D 785003A1 4638C6B0 AA75A4EC
Max Life: 4D01D6BA 5B9C7A0F 741E38F4 93F2170F
Max Focus: CE9C8479 965493A3 5201DCFA 1516DB15
Max Copper: 05161FF6 2E181AED F5873C6F 67F702E2
Max Strength: DA192F69 F8AC8344 6085A34F 63A706B6
Max Agility: 644FCD3C D955A48F D46D7239 E9346CD4