Use the following combinations to unlock the desired effect. In the main menu, hold L and press:
28 Stadiums: Up, Down, Left, Right, Square, Square, Square
King and Queen: Up, Down, Up, Down, Square, Triangle, Square
Start World Tour Mode with $1 Million: Up, Down, Left, Down, Triangle, Triangle, Triangle
Every Week get $ 2.000 in World Tour Mode: Up, Down, Right, Down, Triangle, Square, Triangle
Sepia Mode: Up, Down, Left, Right, Left, Left, Left
All Racquets and Clothing in World Tour Mode: Right, Left, Right, Right, Up, Up, Up