Unlock All
At the title screen you must put in the following codes: [A], [A], [B], [B], [Y], [Z], [Up], [Right], [R]. Note that you must have at least 50,000 coins in order to use codes.
Select costumes
Highlight a character and press [Y] at the selection screen.
Long-haired Sakura
Highlight Sakura and press [X] at the character selection screen. Highlight Sakura and press [Z] at the character selection screen to have long-haired Sakura in an alternate costume.
Alternate Mizuki
Highlight Iruka and press [X] at the character selection screen for his original costume. Highlight Iruka and press [Z] at the character selection screen to have Mizuki in an alternate costume.
Unmasked Haku
Highlight Haku and press [X] at the character selection screen for unmasked Haku. Highlight Haku and press [Z] at the character selection screen to have unmasked Haku in an alternate costume.