Get Silver Class Tournament
Win the Knockout Tournament on Bronze.

Get Gold Class Tournament
Win the Knockout Tournament on Silver.

Get Mickey Goldmill
Win the Movie Mode on Champ setting.

Get Rocky Statue
Win the Movie Mode on Contender Setting.

Get 2X Speed Boxing
Go to the main menu and HOLD R and press Down, Left, Down, Up, Right, L.

Get default boxers, arenas & Rocky statue
Go to the main menu and HOLD R and press Right, Right, Right, Left, Right, L.

Get All Default Boxers & Arenas
Go to the main menu and HOLD R and press Right, Down, Up, Left, Up, L.

Get 2X Punch Damage
Go to the main menu and HOLD R and press Right, Down, Left, Up, Left, L.

Get Max Stats for Movie Mode
Go to the main menu and HOLD R and press Right, Down, Down, Up, Left, L.

Get Max Stats for Tourney & Exhibition Modes
Go to the main menu and HOLD R and press Left, Up, Up, Down, Right, L.