Naruto: Gekitou Ninja Taisen! 2 Cheat Codes for Gamecube

Alternate Mizuki:
Highlight Iruka and press X at the character selection screen for his original costume. Highlight Iruka and press Z at the character selection screen to have Mizuki in an alternate costume.

Unmasked Haku:
Highlight Haku and press X at the character selection screen for unmasked Haku. Highlight Haku and press Z at the character selection screen to have unmasked Haku in an alternate costume.

CPU battle mode:
Successfully complete story mode to make this available for purchase at Anko's shop.

Select costumes:
Highlight a character and press Y at the selection screen.

Long-haired Sakura:
Highlight Sakura and press X at the character selection screen. Highlight Sakura and press Z at the character selection screen to have long-haired Sakura in an alternate costume.

Team battle mode:
Get the best score in time attack mode to make this available for purchase at Anko's shop.

Shadow fighting mode:
Get the best score in time attack mode to make this available for purchase at Anko's shop.

Bonus story mode battles:
Successfully complete the first twenty episodes of story mode to unlock a new episode that is available for purchase at Anko's shop.. Complete that episode to unlock the next bonus episode. There are a total of ten bonus story mode episodes that can be purchased.

Background music option:
Buy all of the bonus story mode battles to make this available for purchase at Anko's shop.

Additional difficulty option:
Finish in first place in survival mode to make this available for purchase at Anko's shop.

Additional damage option:
Finish in first place in time attack mode to make this available for purchase at Anko's shop.

Stats option in Omake menu:
Successfully complete the first twenty episodes of story mode to make this available for purchase at Anko's shop.

Character profile option:
Successfully complete the game to unlock the corresponding character profile for that person available for purchase at Anko's shop.

Character sound effects:
Successfully complete the game to unlock the corresponding sounds for that person available for purchase at Anko's shop.