At the Start Screen, hold down R and enter LEFT, A, RIGHT, X, Y, LEFT, RIGHT, B.

Beat the Davy Back Fight 29 times

Beat the Davy Back Fight 18 times.

Beat the Davy Back Fight 10 times.

Beat 3 events in the Davy Back Fight, and beat the Davy Back Fight 3 times .

You must win 33 times and play Davy Back Fight once.

You must win the Davy Back Fight 26 times.

You must beat the Davy Back Fight 34 times.

You must play the Usopp's Pirates' Challenge and beat all 3 games to unlock a new System Voice.

Win the Event Battle with all 19 characters.

Once you unlock everyone, you must complete their move lists in training mode and destroy all the pillars in the stage.

First you need characters 1-15 the beat story mode with all of the 15 characters on all difficulty modes. Then beat the game again on very hard mode with Luffy. When the credits of done there will be no image of crocodile being unlocked. Go to story mode, at the character select screen you'll see crocodile pick him and beat story mode. At the end of the credits it should show his image of him being unlocked. Now he is then free to use in any game mode.

First you must unlock all of the characters.