Rocky

Unlock every boxers, arenas, Rocky Statue, and Mickey Goldmill
Go to the main menu and enter the following button combination:
Hold R and press Up, Down, Down, Left, Left, L.

Unlock every boxers, arenas, Rocky Statue
Go to the main menu and enter the following button combination:
Hold R and press Right, Right, Right, Left, Right, L.

Unlock every boxers and arenas
Go to the main menu and enter the following button combination:
Hold R and press Right, Down, Up, Left, Up, L.

2x speed boxing
Go to the main menu and enter the following button combination:
Hold R and press Down, Left, Down, Up, Right, L.

2x punch damage
Go to the main menu and enter the following button combination:
Hold R and press Right, Down, Left, Up, Left, L.

Maximum stats in tournament and exhibition modes
Go to the main menu and enter the following button combination:
Hold R and press Left, Up, Up, Down, Right, L.

Maximum stats in movie mode
Go to the main menu and enter the following button combination:
Hold R and press Right, Down, Down, Up, Left, L.

Beat a fight in movie mode
Go to the main menu and enter the following button combination:
Hold R and press Right, Right, Left, Left, Up, L.
While fighting, press L2 + R2 to instant win.

Unlock Gold Class Tournament
Finish the Silver mode of the Knockout Tournament

Unlock Silver Class Tournament
Finish the Bronze mode of the Knockout Tournament

Unlock Mickey Goldmill
Finish movie mode in champ mode

Rocky Statue
Finish movie mode in contender mode