Naruto - Clash of Ninja 2 - Platform: Gamecube

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

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

Alternate Mizuki:
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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.

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

Bonus Story Mode Battles:
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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.

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

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

Cpu Battle Mode:
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Successfully complete story mode to make this available for purchase 
at Anko's shop.

Long-haired Sakura:
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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.

Neji: Combo:
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Press Down, B(2), Forward, B(2), A, B(3), X. Neji will do a low kick, 
a high kick to hit the opponent into the air, a two handed blow, a 
punch, then pull out a kunai, have three punches, then finishes it 
off with Hakke Rokujyuu Hanshyou (Sixty-four Points of Divinity).

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

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

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

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

Unmasked Haku:
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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.