Naruto: Uzumaki Chronicles 2 Unlockables and Secrets (PS2)

Naruto: Uzumaki Chronicles 2 (known as Naruto: Konoha Spirits in Japan) is a video game by Bandai Namco. It is based on the popular manga and anime series Naruto by Masashi Kishimoto. This game is a sequel to Naruto: Uzumaki Chronicles. The game is an action-RPG where the player travels across a map and completes missions to gain experience points in order to achieve new abilities or increase their character's stats. Unlike its predecessor Uzumaki Chronicles, the game is not mission based. One can find the missions in a separate mode. The Story mode shows Naruto facing ninja who control puppets just like Kankuro. The game is rather short (only 10 chapters), but the Versus mode and the Mission mode provide a bit of replayability. There is also a second scenario starring Kakashi.

Playable characters
A list of playable characters is as follows. Characters new to the series are marked with an asterisk (*):

Naruto Uzumaki
Sasuke Uchiha
Kakashi Hatake
Neji Hyuga
Choji Akimichi
Shikamaru Nara
Gaara
Sakura Haruno *
Rock Lee *
Might Guy *
Kankuro *
Hinata Hyuga *
Asuma Sarutobi *
Itachi Uchiha * (Only in VS mode)
Kisame Hoshigaki * (Only in VS mode)

Unlockables

Unlockable missions, story and characters
Hoshigake Kisame (In 2 Player vs. mode) - Finish Kakashi Gaiden

Kakashi Gaiden(Story) - Complete all missions(Including S Ranks)

Sasuke - Pass story mode twice

Uchiha Itachi(In 2 Player vs. mode) - Finish Kakashi Gaiden

Unlock S Rank Missions - Complete the game once

Secrets

Restore Chakra
During the loading screen if allocated enough time to move the right thumbstick enough in a circle a blue Chakra Ball will pop-out and if you notice your unfilled Stamina / Chakra Ball it will refill a little about 25% worth every time you do this between loading screens with the Konoha Symbol in the lower right corner

The game has evolved a lot! Now it can compete with the best fighting games, like Tekken or Mortal Kombat (any game of the series). See some gameplay footage if you don't believe me: