At the team selection screen, press R1(3), Right.

All-Time players 

At the main menu, press L2(3), Right.

Best Italian players (Azzuri) 

At the main menu, press L2, Up(2), Right.

GameShark codes NTSC

All bonus teams:
800E4D3C FFFF 
Home team scores 10:
8011FF54 000A 
Home team scores 0:
8011FF54 0000 
Away team scores 10:
80120178 000A 
Away team scores 0:
80120178 0000
rdshfs22586. 

PAL
Joker Command D00D 7CD6 ???? 
Home Team Scores ?? 8011 FF54 ??01 
Away Team Scores ?? 8012 0178 ??01