You have to beat the enemies on the game and then you got the characters in the game
Chat with our AI personalities
Best place for this answer would be to go to IGN or Gamefaqs
You have to discover all secerts
Their is no cheat to unlock all the characters all at once.Only cheats to get the characters seperatly.
yes there is a code if you enter xbwtl it will unlock all the characters for you.
get naruto six tails kyuubi in awu 3 to unlock all characters