Unlock Unmasked Haku:
1) Highlight Haku at the Character Selection Screen.
2) Press X or alternately press Z for unmasked Haku in alternate costume.

Unlock Alternate Mizuki:
1) Highlight Iruka at the Character Selection screen.
2) Press Z or alternately press X for original costume.

To be able to enter the following code you must first have collected 50,000 coins. When you have the coins go to the 'Title' screen and enter A, A, B, B, Y, Z, Up, Right, R.

Unlock Background Music Player:
Get ALL characters and buy from the shop for $10,000

Unlock Gallery Mode:
Buy from shop for $6,000 after all characters are unlocked

Unlock Team Battle:
When you have placed 1st in Survival mode you can buy it from shop for $2,500

Unlock View Mode:
When you have beaten Single Player mode with any character you can buy it from the shop for $2,500

Unlock Oboro Mode:
When you have placed 1st in Survival mode and Time Attack mode you can buy it from shop for $3,500

Unlock Characters
To unlock the first set of characters you have to beat Story mode. The second set of characters you need to get first place in Time Attack and the third set of characters you need to get first place in Survival mode and have all the characters unlocked from the second set. The final two characters are unlocked by having defeated and unlocked ALL the previous characters.

The following is a list of how much they cost in Anko's shop.

Iruka 2,000

Neji Hyuuga 2,000

Karasu 2,500

Kankurou 2,500

Akamaru 2,500

Haku 3,000

Gai 3,500

Zabuza Momochi 4,000

Kyuubi Naruto 5,500

Sharingan Kakashi 7,500

Mizuki 15,000

Orochimaru 50,000

Sharingan Sasuke 100,000


Unlock Shadow and Team Battle Modes

Unlock Team Battle Mode:
Complete Time Attack Mode

Unlock Shadow Mode:
Unlock Mizuki and Team Battle, then buy for 3,500 in Anko's shop

Naruto Clash of Ninja Bonus:
If you have a game 'Save' from the first Naruto Clash of Ninja on GameCube the shop will give you a bonus 10,000 to start with.