Mr. 2 Bon Clay
There are 2 ways to unlock Mr. 2 Bon Clay. The first way is after you unlock Mihawk, finish Story Mode with every available character on every difficulty setting (Easy, Normal, Hard, and Very Hard. Make sure you have at least 40 hours of accumulated gameplay at this time. Finally, beat Story Mode with Sanji on the Very Hard difficulty setting. Bon Clay appears as the final boss, and is selectable in Story Mode if you defeat him with you Secret Attack. Finish Story Mode with Bon Clay, and he becomes selectable in all other modes. The second way is easier. Beat Story Mode with Sanji on any difficulty level. During the ending credits, enter this code:
Hold L1 and press: X, X, Circle, X, Left, X, Circle, Square, X, Circle, Triangle, Circle, X, R1, R1, Left.
To unlock Mr.0, you must first unlock characters #'s 1-15, then input this code after beating story mode with Mrs. Sunday:
down, X, left, down, triangle, X, circle, square, up, circle, R1, left, triangle, right, square, R1
To do this, you may need to hold down the L1 button.
(NOTE: Mr. 0 has the abilities of the sand sand fruit.)
Unlock All Characters
At the start screen
Press: x up down left right circle square up x. You should hear Luffy say, "alright!"
Gum Gum Scythe Attack Add-Ons
To get extra attack add-ons for Luffy's Gum Gum Scythe Attack, when you use this attack you must have over four fruits. Then, when you attack, after your opponent hits the wall, press circle and you will hit your opponent in the air. Then keep pressing circle. Then you will do another add-on. You will hit them in the air. Then keep pressing circle. Then for the final attack add-on, you will hit them up again again Luffy will count down, 3 2 1. then he will yell and twist like a spiral and bounce up and smash your opponent throught the roof of the building. If you KO your opponent doing this trick you will see the building fall around Luffy, and he will say, " I'm gonna be King of the Pirates!" And you will win. Note: this trick works well with over four fruits and if your opponent health is down a little bit past halfway.
If, in a fight, you press one of the D-pad buttons, it will either change something about the character's appearence, or perform a taunt.
Luffy-take off his hat
Zolo-put on his bandana
Sanji-put on his sunglasses
Usopp-put on his goggles
Change Sanji's Secret Attack
If Sanji is fighting Nami or Miss Sunday (or it may just be Nami) if you perform his secret attack he says different stuff, and in the end, his eyes become hearts (if you kill them with the secret attack, the complete one, in the end he'll go "I wish we could've spent more time together," while hearts are floating around him.)