Cheats for Mario Party 4 for GameCube

If you have a controller with a turbo hold it and press A and then the starts just hold A you can get alot like 100 or more.

Press L during game play to hear your character's taunt. You can only do this while on game board, but not in mini-games. Press L + C-stick Up for a faster version. Press L + C-stick Down for a slower version. Press L + C-stick Left or C-stick Right to vary its volume.

Win against Goomba in story mode to unlock Goomba's Chip Flip. 
Win against Shy Guy in story mode to unlock Archeologuess.
Win against Toad in story mode to unlock Bowser Bop.
Win against Boo in story mode to unlock Mystic Match 'Em.
Win against Koopa in Story Mode to unlock Kareening Koopas.
Win against Bowser in Story Mode to unlock The Final Battle. 

Win Beach Volley Folley in tournament mode.

Finish the Mario Speedwagons mini-game in ten seconds or less.

Defeat Bowser in story mode as Donkey Kong.

Complete the Mario Medley mini-game with a time of 1:00 or less.

Defeat Bowser in story mode as Mario.

Defeat Koopa in story mode as Daisy.

Defeat Goomba in story mode as Daisy.

Defeat Shy Guy in story mode as Daisy.

Defeat Toad in story mode as Donkey Kong.

Defeat Shy Guy in story mode as Donkey Kong.

Knock over 100 or more dominos in the Domination mini-game.

Finish the Right Oar Left mini-game with a time of 0:45 or less.

Defeat Goomba in story mode as Luigi.

Defeat Shy Guy in story mode as Luigi.

Defeat Koopa in story mode as Mario.

Defeat Toad in story mode as Mario.

Defeat Goomba in story mode as Mario.

Defeat Toad in story mode as Peach.

Defeat Goomba in Story mode as Peach.

Finish the Dungeon Duos mini-game with a time of 1:30 or less.

Solve a 30 piece puzzle in Jigsaw Jitters with a time of 2:00 or less.

Defeat Koopa Troopa in story mode as Waluigi.

Defeat Boo in story mode as Waluigi.

Defeat Goomba in Story mode as Yoshi.

Defeat Boo in Story mode as Yoshi.

To win The Final Battle, jump across the turning platforms with A. Once you reach the other side, you will have to solve a puzzle. Ground-Pound the three pieces to form a Bowser Kid. The new zone will be like the first, but with three flames coming out of the tiny pillars. Make your way across again. You must now solve a larger puzzle with little pieces. Once you complete the puzzle, go left to face Bowser. Stomp three buttons. It will form a triangular beam. Make sure Bowser is lured inside the triangle. He will get shocked. Do this five times to defeat Bowser.

To unlock BOWSER BOARD, get everyone's present in story mode, then toad will come up and say there is 1 more present, Bowser will come down and take ALL your presents. Succesfully complete his board (and win) and you will unlock bowser Board, and other cool things.