Shinobido: Way of the Ninja

Note: This game is titled "Shinobido Imashime" in Japan.

Iron Stomach:
Press Start to pause game play, then hold L1 + L2 and press Up, Down, Up, Down, Left, Right, Square. A sound will confirm correct code entry. All items Goh eats will be edible and will restore health.

Alternately, view all three normal endings.

Fake death:
Press Start to pause game play, then hold L1 + R1 and press Down, Up, Right, Left, Down, Up, Square. A sound will confirm correct code entry. Press the Right and your character will die. You can also do a Mega Jump by pressing X then quickly pressing Right.
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Completion bonuses:
Successfully complete the game. You can continue the game on your cleared saved game file. This will also unlock the "Theater" option, Garden upgrades, as well as an alternate Goh model and the first set of costumes.

Crazy Ninja difficulty:
Successfully complete the game under the normal difficulty setting.

Very hard difficulty:
Successfully complete the game under the hard difficulty setting.

Goh's alternate costumes:
To unlock a second set of costumes, view all three normal endings or the hidden ending.

Kinu's alternate costumes:
Successfully complete the game under the hard or Crazy Ninja difficulty setting.
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Trust In Yourself:
View all three normal endings.