All Lives and Ammo
Press start during the game and press L1, L1, L2, L2, L1, R1, L1, R1, R2, R1. Every time the code is entered you will lose a level.
Enter Circle, X, Right, Left, Right, Left, Down, Down, Up, Up at the title screen.
Two-Player Versus Mode
Complete ZOE once, and a two-player mode with five Frames and most levels will be unlocked. Finish the game a second time for the remaining two Frames.