Avatar: The Last Airbender Cheats for Nintendo DS

Air Scroll (Air Temple in Chapter 6):
When you leave the temple and go west and north you will play 'The 4 Nations Force' game with Gyatso. If you lose the game or quit, you will be rewarded with the Air Scroll.
Earth Scroll (Air Temple in Chapter 6):
Go south to find the Earthbender who will give you a challenge. If you win this challenge you will get the Earth Scroll.
Water Scroll (4-Paws Island in Chapter 5)
Head through the middle of the island to seek out a monster. When you defeat the monster follow it when it tries to hide and it will lead you to a yellow chest which will have the Water Scroll.

The following is a list of the special moves for each character and how to get them.
Aang:
1st Move: Already Learned.
2nd Move: Level 10.
3rd Move: Level 21.
4th Move: Level 28.
5th Move: Learn from Air Scroll in Chapter 6.

Haru:
1st Move: Already Learned.
2nd Move: Level 22.
3rd Move: Learn from Earth Scroll in Chapter 6.

Katara:
1st Move: Already Learned.
2nd Move: Level 24.
3rd Move: Learn from Water Scroll in Chapter 5.

Sokka:
1st Move: Already Learned.
2nd Move: Level 11.
3rd Move: Buy from Incense Store at 3rd Chapter or above.
4th Move: Buy from Incense Store at 5th Chapter or above.

The second boss uses his basic attack and his second attack which can only be blocked by aang's/ katara'a SPECIAL defense so make sure you use your special defense or you will find that you die a lot

At the 'Extras' menu select the 'Cody Entry' page and enter the following codes to unlock the corresponding effect.
23637 - Unlock Unlimited Copper
24463 - Unlock Unlimited Chi
34743 - Unlock Double Damage
37437 - Unlock ALL Treasure Maps
53467 - Unlock Unlimited Stealth
54641 - Unlock One Hit Dishonor
94677 - Unlock Unlimited Health
97831 - Unlock Character Concept Gallery

Ok, so, I'm not really sure about this, but I think I know how to get every character's last move. You have to find scrolls, which are hidden in levels. You get Katara's healing move from the waterbending scroll, which is on Four Paws Island(or something like that). The other two scrolls are for Aang and Haru. I'm not sure where they are, though, so seach the all the levels. You can buy the bomb for Sokka at the store on the last level for 900g.