To enable cheat codes of the game, first, enter the following code after pausing the game:
Down, L, Z, R, Left, X
Now you can choose a code and enter it to get what you want. Note that you should do it quickly only after a pause:
All objects: Down, Z, Up(2), R (disable: R, Up(2), Z, Down).
All visit locations: Left, Z, R, L, Z (disable: Z, L, R, Z, Left).
All socials: L, R, Down(2), Y (disable: Y, Down(2), R, L).
Team picture: R, Z, Down (disable: Down, Z, R).