Unlimited Spells:
Press Start while playing a game. Then Hold L2 and L1 and press, triangle, left right,circle(2),triangle,down.

All Devil Own:
Press start while playing a game. Then hold L2 ad L1 and press left(3), circle(4), triangle, down, right.

Invincibility:
Press start while playing a game. Then hold L2 and L1 and press square(3), circle, x(3), left, down, up, left.