Unlimited items or gold
Find a location that contains multiple items or gold, such as the first room in Oedo Castle. Collect the items, leave the room, then re-enter. The items will be available for recollection.
Boss mode
Collect all forty-five Fortune Dolls to unlock a boss mode selection on the options screen.
Bonus picture
Enable the "Boss mode" code, and complete the Boss sequence.
Control Impact
Press the Analog-stick when Impact's introduction sequence ends to move his head.
Rumble Pak bonus
Although not an official Rumble Pak game, the Boss levels will support that peripheral.
Hint: Slower falls
Rapidly execute the Ice Attack or Coin toss while falling.
Hint: Avoid attacks
Change characters just before an opponent attacks.
Hint: Quick fall recovery
Perform an attack exactly when hitting the ground after falling from a large height. This will allow Goeman to move immediately, instead of being stunned.
Hint: Avoid bullets
Push C-Down to have bullets pass through your character.
Hint: Fighting Benkei
Fight Benkei as Ebisumaru to throw the Achilles' Heel at him faster. During the battle, Benkei will threaten to blast you far away. This is a lie; he will knock you into the river next to the bridge where he is standing. There is a ladder available to return to your previous location.
Glitch: Small Goemon
If Goeman uses a transporter while small, it will leave without him.