Mario Party 6 cheats and cheat codes for Gamecube

Unlockables:
You can purchase the following options and features at the star bank 
for the indicated amount of stars:

Yoshi Taunt - Purchase for 10 stars
Wario Taunt - Purchase for 10 stars
Waluigi Taunt - Purchase for 10 stars
Variety Sound Test - Purchase for 30 stars
Toadette - Get 30 stars in the Star Bank.
Toad Taunt - Purchase for 10 stars
Solo Mode Sound Test - Purchase for 30 stars
Seer Tower - Get 50 stars and Purchase
Peach Taunt - Purchase for 10 stars
Party Mode Sound Test - Purchase for 30 stars
Miracle Book Secret - Purchase for 10 stars
Miracle Book pages 7-11 - Purchase for 20 stars each
Miracle Book pages 2-6 - Purchase for 10 stars each
Miracle Book pages 17-20 - Purchase for 40 stars each
Miracle book page 12-16 - Purchase for 30 stars each
Miracle Book - Purchase for 10 stars
Mini Game Secrets - get 20 stars and Purchase each
Mini Game Mode Sound Test -Purchase for 30 stars
Mario Taunt - Purchase for 10 stars
Magma Flow - Purchase for 50 stars
Luigi Taunt  - Purchase for 10 stars
Koopa Kid Taunt - Purchase for 10 stars
Harder Computer Rating - Purchase for 30 stars
Daisy Taunt - Purchase for 10 stars
Clockwork Castle Board - Purchase for 100 stars 
Character Sound Test - Purchase for 30 stars
Brutal Computer Rating - Purchase for 30 stars
Boo Taunt - Purchase for 10 stars
Block Star 2 player - Purchase for 50 stars

Block Star, Lab Brats, Dunk Bros:
Land on rare mini game space at the end of solo mode board

Mini-game Verbal Assault: 
Say the following names and the character or object will pop out.
Note: Some of these only works if you're the player using the microphone.
Say "Brighton" - Unknown
Say "Bullet Bill" - Secret Weapon 
Say "Cheep Cheep" - Unknown
Say "Fly Guy" - Fly Guys at Mode Select
Say "Gears" - Drop gears in front of your machine
Say "Goomba" or "Nuts" - Get hidden weapons 
Say "Twila" - Unknown 
Say "Ukiki" - Monkeys throw something at the other players
Say "Zero" - Shut Your Mouth
Say "1" or "2" or "3" or "4" or "5" or "6" - Control dice in Solo mode