World Cup'98
Creations Teams
Type "BuryFC" as the name of any player on the team customization screen (after you selected your team). The names of the England team then become Creations football team and development team for World Cup.

 Creations Teams
 Earn World Cup

 Perform Sound

Earn World Cup Classics
In case you haven't figured it out yet: In order to unlock the secret classic World Cup matches, simply go with a team of your choice through the whole World Cup and win the trophy. The World Cup Classics mode is now accessible from the main screen. You can also save to your memory pak to keep it open.

Perform Sound Effects
To perform your own sound effects after scoring or conceding a goal, press A, B, C-Left, or C-Down.
Credit For All Codes Goes To: IGN 64