All items (Japanese version):
Wait until the conception sequence begins during the title screen. Press Circle(6), sweep the D-pad in a clockwise Full-Circle three times, and press Triangle, Square(2),Triangle, X, Start.

Invincibility (Japanese version):
Quickly press [Triangle(2), Left, Right, Square(2), Select, L1, L2, R1, R2] three times within five seconds at the title screen. The background color will turn blue to confirm correct code entry.