by joash009 Jan 08, 2008 it is so easy to unlock this charaktersUnlockable:How to unlock:Gaara of the sandfinish very hard difficulty and after the credits there is a game if you reach the bonus game and if you luckily choose the 3 headsRock Leefinish very hard difficulty and after the credits there is a game if you reach the bonus game and if you luckily choose the 3 headsCellfinish very hard dif