To unlock division one go to the main menu and press:
Select, Select, Circle, Circle, L2, L2, Triangle, Triangle, Select, Square,
Select.
Select, Select, Circle, Circle, L2, L2, Triangle, Triangle, Square, Circle,
Select.
Select, Select, Circle, Circle, L2, L2, Triangle, Triangle, Square, R1, R1,
L1, R2.
Select, Circle, Square, Triangle, L1, L2, R1, R2, Select, Circle, Circle,
Circle, Square, Triangle, Triangle, Triangle, Square.