At the main menu, hold L + R and press Circle, X, Triangle, Square, Circle(2), X(2), Triangle, X(3). If you entered the code correctly, you will hear the sound of someone kicking a goal.
Unlockable Teams for 2006 FIFA World Cup:
Use 20,000 points in the Fifa store.
Run straight without moving then press Shoot at 18.
Run straight without moving then press Shoot at 18.