Cheat mode:
     At  the  main menu, hold L1 then press X, X, X, X, X, Circle, R1,
R2, R2, R1.

Infinite Life:
     At  the Main Menu, press Left, Left, Left, Right, L2, L1, R2, R1.
Then to open an in-game Cheat Menu, press Start during a game.

Infinite Ammo:
     At  the  Main  Menu, press Down, Right, Up, Left, L2, L1, R2, R1.
Then to open an in-game Cheat Menu, press Start during a game.

All items:
     At  the  main  menu, press Right, Left, Up, Down, L2, L2, R2, R2.
Then to open an in-game Cheat Menu, press Start during a game.