Naruto - Konoha Spirits - Platform: Playstation 2

"S" rank missions:
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Successfully complete Story mode to unlock the "S" rank missions.

Kakashi Gaiden story:
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Successfully complete all normal and "S" rank missions to unlock the Kakashi 
Gaiden story.

Play as Choji:
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Successfully complete Chapter 6 to unlock Choji.

Play as Gaara:
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Successfully complete Chapter 9 to unlock Gaara.

Play as Hoshigake Kisame:
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Successfully complete the Kakashi Gaiden story to unlock Hoshigake Kisame in Two 
Player Vs. mode.

Play as Kakashi:
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Successfully complete Chapter 1 to unlock Kakashi.

Play as Might Guy:
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Successfully complete Chapter 8 to unlock Might Guy.

Play as Neji:
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Successfully complete Chapter 3 to unlock Neji.

Play as Rock Lee:
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Successfully complete Chapter 5 to unlock Rock Lee.

Play as Sakura:
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Successfully complete Chapter 1 to unlock Sakura.

Play as Sasuke:
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Successfully complete Story mode two times to unlock Sasuke.

Play as Shikamaru:
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Successfully complete Chapter 4 to unlock Shikamaru.

Play as Temari:
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Successfully complete Story mode two times and all 35 missions and survival 
misions to unlock Temari.

Play as Uchiha Itachi:
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Successfully complete the Kakashi Gaiden story to unlock Uchiha Itachi in Two 
Player Vs. mode.

Refill Chakra:
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During the loading screens that have the Konoha symbol in the bottom right 
corner, quickly rotate the Right Analog-stick in circles. If done correctly, a 
blue Chakara Ball will appear and refill some of your Chakra gauge.

Easy protection missions:
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When you play the missions where you have to protect something or hold off 
enemies for a certain amount of time, just use Shikamaru's Kage Mane no Jutsu. 
The attack holds off all the opponents you capture and they will not respawn 
unless you kill them. You can hold them off for as long as desired.
Defeating Shirogane girl's Giant Puppet Bee in Kigan Hill 
When fighting the Shirogane girl's Giant Puppet Bee, switch to Lee, and lock 
onto the bee. Make sure you have lots of Rations As or Bs. Once you have locked 
onto the bee, repeatedly use Dynamic Entry, and use rations to replenish Chakra 
when needed. This will kill the bee quickly.