Level skip
Highlight "Exit" selection on the options
screen. Then, hold [X] and press [B], [A], [RS].
Release [X], then press [X] again. Fidex will bark
to confirm correct code entry. Alternatively, hold X and press
[P], [A], [RS], [A], [LS]x2, [A]
to activate the code. Zack will say "Digital" to confirm
correct code entry.
Press [LS] + [A] to advance one level.
Press [LS] + [B] to advance five levels.
Press [LS] + [C] to advance ten levels.
Press [LS] + [RS] to go back one level.
Secret level(s)
Highlight "Exit" selection on the options
screen. Then, hold [X] and press [LS], [A]. Release
[X], then press [X] again. An enemy voice will say "Hey!"
to confirm correct code entry. Secret level 25 will be playable
in the US version of the game. Twelve additional secret levels
will be playable on the Japanese version of the game.