Naruto - Gameboy Advance
Unlock Kakashi:
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In order to unlock Hatake Kakashi beat the game with both Naruto
and Sasuke.
Unlock Sound Test Mode
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To successfully unlock the Sound Test Mode, just collect all 100
Leaf Symbols and it'll appear on the Main Menu.
Unlocking Gaara
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To fight the hidden Boss Gaara, beat the game with somebody and
then start over as them. The levels will change, and the final
boss will be Gaara
2nd Mission
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Beating the game one time with any character will unlock a 2nd
''night-time'' mission for that character. The levels will remain
the same, but the final 3 bosses are different.
Portrait Gallery
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Beating the game one time will unlock the portrait gallery,
where you can view portraits for all the characters you meet,
and the bosses you've beaten.
Secret Jutsus
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On the Leaf Village Arena level, 1st Area (first level where
you get the wind scroll) near the end of the level, you will
fight a jounin-level enemy (big green ninja) and to the right
of the platform he is standing on, there is a small crawl-way.
Inside of the room, there is a large invisible scroll. When you
acquire it, that character will permanatly learn level 4 Jutsus
(if you save your game.)