All items:
At the title screen, press Circle, Circle, Cirlce, Circle, Circle, Circle, rotate the D-pad in a clockwise Full-Circle three times, then press Triangle, Square, Square, Triangle, X, Start.
Invincibility:
At the title screen, press [Triangle, Triangle, Left, Right, Square, Square,
Select, L1, L2, R1, R2] 3 times within 5 seconds.
