hints naruto ultimate 5

Unlockable Characters

Beat certain events in Master (Story) Mode.

Unlockable	How to Unlock
Kisame	Beat Kisame in Master (Story) Mode
Sasuke	Beat Sasuke in Master (Story) Mode
Orochimaru	Beat Orochimaru in Master (Story) Mode
Kabuto	Beat Kabuto in Master (Story) Mode
Chiyo	Meet her Master (Story) Mode
Chiyo with Puppets	Beat Sasori True Form in Master (Story) Mode with her
Itachi	Beat Itachi in Master (Story) Mode
Sasori Hiruko	Beat Sasori in Master (Story) Mode
Yamato	Beat Sai in Master (Story) Mode
Sai	Beat Sai in Master (Story) Mode
Sasori True Form	Beat Sasori True Form in Master (Story) Mode
Deidara	Beat Deidara in Master (Story) Mode

Unlock Narutimate difficulty

Beat all of Gai's challenges (first option) in the training grounds.

Sasuke RPG mode

Finish the master mode and all of the side quests, and then go to the room where you first defeated Sasuke, access the blue aura there, and done.

Secondary Form of Characters

To unlock the secondary form of all the characters, just beat the story mode. Then, in VS mode, push R1 to see the secondary form and select for it. This doesn't work on all the characters, only on the ones that have a secondary form in the anime (ie: Neji doesn't have one, but Choji does (his super pill form))
Naturally, this only works on characters that you've already unlocked (which should be all if you beat story mode)