Goemon's Great Adventure Codes -

Four player mode:
Insert controllers into all four ports and begin game play using controllers one (and/or two). Collect forty-four entry passes from various levels. Then, press C-Right + Start on controllers three and four.

Alternate costumes:
Unlock four player mode, then go to the "Prediction" house to access new costumes for each character.

Control ending screen:
Highlight the "Try Again" option at the game over screen, then repeatedly tap A to move the hula hoop faster.

Double coins:
Wait until night to get two coins from an opponent that would normally only have one coin.

Unlimited items:
Begin the game and go to the upgrade store. Purchase any desired item, then go to the save location and save the game. Reset the game. When the game is resumed, you will have all your money plus the item that was purchased. This may be repeated to get an unlimited number of items.

Unlimited lives:
Go to the restaurant, buy sushi, and you will gain one life. go to the Inn, save and reset the game. You will have another hundred coins that you can buy sushi with again. Repeat to gain the desired amount of lives. Hint: Strange looking characters: Press Z to crouch, then hold A to get your character to stand up and appear as if they are always running. Note: If you jump, press B to attack, or get hit your appearance will change.