Permanent Turbo (enter before VS screen):
     Hold  Turbo  and  move  joystick up and down rapidly on VS screen
before releasing it.

Enter these initials for big fun. Whoo...

PJP 11/2 - Invisible Team 
MJT 3/22 - Smiley Team
LAN 9/10 - Special Team
JBP 5/17 - All Special Teams

Beach Ball Mode:
     Enter pass, pass, turbo, extreme, turbo, pass, pass before tip-off