After you earn Demon Fox Naruto, set game to 2nd or 3rd difficulty, no time limit, and 5 rounds. Let his chakra build and keep using his special move, and lose a round or two to help build chakra and your score. You get alot per hit, I earned 28,875,000 with Demon Fox Naruto

Look to your right and you will see chouji eating and pigging out!

What I advise you to do is, go and play story mode to unlock Rock Lee. You have to play story mode with out losing to: Iruka, Sasuke, Sakura, Kakashi, Haku, and Zaboza.After you beat Zaboza, you meet Rock Lee. Rock Lee is harder than he looks so if you lose try again. Losing to Rock Lee DOESN'T mean you don't get him.
Then to get Kabi Naruto play everyone TWICE, not three times, not four times, TWICE.you will get the characters profile and voice. It's ok if you lose. Once you are done with your last character, go to Naruto and do him again. Once your done it will say you unlocked Kabi Naruto.
To get Shargan Kakashi all you have to do is use him in one player mode again and then you'll get him!!!

You MUST get them in this order!!!

The two really secret players in this game are demon naruto and sharingan kakashi. Demon naruto is strong but sharingan kakashi can copy special jutsus.

When youre playing single player mode and the difficulty is 3 or lower charge kakashi's special jutsu your opponent wont move or hit you.

Don't waste your time with that unlock hinata crap hinata will be in clash of ninja two which will realease in october 06

To get more than 3,000,000 points in one player mode play with Iruka Umino and use his special move origanal move(thats the name of it)you should get 25 or more combo hits.The best I've got is 3,687,940.

An easy way to beat your opponent is if you really good with Sasuke, keep using his jump attacks or his poofing into smoke attack.You can also do these attacks with a combo of kunai after.

Q:How to unlock kuybi Naruto?
A:You need to beat the one player battles with every person including Rock Lee.After you unlock the sound test(thats after you beat the one player battles with every player)You have to beat the one player battles onece again.Then you will unlock kuybi Naruto.Highlight Naruto and press "Z" to use kuybi Naruto.

QHow do you unlock sharingan kakashi?
A:You use the same process, only after unlocking kuybi Naruto you beat the one player battles with kakashi.After that you press "Z" to use sharingan kakashi.
NOTE:kakashi has to be highlighted.

To unlock naruto in demon form beat 1 player mode with everyone twice (including lee) and you will unlock demon naruto

Ok first you get demon naruto then you beat beat one player mode with demon naruto at first I dint have sharingan kakashi but then I eventually got him bcause you also have to beat the game yet again with the original kakashi. (i still don't understand sharingan kakashi.)

Alot of people say you can get hinata alot say you can't.the awnser is you can you need to have the setings in some exact way before you go one one player mode with sakura.hope this clears things up about hinata.

If it doesn't try different setting different time more lives I'm not sure ill try and figure everything out and get back to you all .

Rock Lee: Beat story mode without using a continue.

Kyuubi Naruto: Beat the game three (3) times on one player mode with everybody.

Sharningan Kakashi: Beat one player mode with Kyuubi Naruto.

There is no Hinata in this game.

When you are Demon Naruto in one player mode try using your special move in every round and battle. For some reason every hit in that move gives you at least
10,000 points. I did this and I got over 1,000,000 points.

Sharingan Kakashi-Beat story mode with Kyuubi, then with Kakashi.Press X or Z over Kakashi when you get him.
Kyuubi-Unlock Rock Lee, then beat story mode with everybody.Press X or Z over Naruto.(You should have everyone except Sharingan Kakashi)
Rock Lee-Beat Zabuza in story mode without using a continue,then beat Rock Lee when he challenges you.(It doesn't matter who you do it with)
No Mask Haku-Beat arcade mode on level 3 with Zabuza.Press X or Z over Haku.
Other Costumes-Press Y over anybody.
Sound Test-Beat story mode with all default characters.(Default characters are characters you had in the beginning of the game)
Hinata may not be in the game