Mystical Ninja Starring Goemon 

Note: This game is also titled Ganbare Goeman 5 or Goeman The Warrior 5.

Unlimited items or gold 
Find a location that contains multiple items or gold, such as the first room in Oedo Castle. Then, collect the items, leave the room, and re-enter. Now 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.

Hidden picture 
Enable the "Boss mode" code, and complete the Boss sequence.

Control Impact 
When Impact's introduction sequence ends, press the Analog-stick to move his head.

Rumble Pak bonus 
Although not an official Rumble Pak game, the Boss levels will support the Rumble Pak.