Billy Hatcher and the Giant Egg cheats and cheat codes for Gamecube

One Sonic egg in every world
Find all five coins in each world

Unlock Bantam Scrambled as playable character:
Finish the Blizzard Castle mission 4 - Save Bantam mission

Unlock Chick Poacher as playable character:
Finish the Dino Mountain mission 4 - Save Chick mission

Unlock Rolly Roll as playable character:
Finish the Pirate Island mission 4 - Save Rolly mission

Unlock 4 hidden bonus emblems
To unlock emblems complete one of the following objectives:

Emblem 57 - Complete the entire Egg Gallery
Emblem 58 - Finish all missions 
Emblem 59 - Find all 280 coins 
Emblem 60 - Finish all missions and reach "S" rating

Unlock Sonic Team game character eggs:
Collect the indicated amount of coins to unlock a Sonic Team egs:
Tails: 155 coins 
Sonic: 135 coins
Rappy: 65 coins
NIGHTS: 185 coins
Knuckles: 205 coins
Kapu Kapu: 35 coins
Chao: 25 coins
Amigo: 105 coins

Unlock Game Boy advance download mini-games 
To unlock the GBA Download Mini Games, go to the following locations 
and hatch the bonus egg:

Billy Hatcher Hyper Shoot Easy - Dino Mountain 2 
Billy Hatcher Hyper Shoot Hard - Sand Ruin 2 
Chu Chu Rocket - Bonus Egg In Pirate Island 2 
Nights - Circus Park 2 
Puyo Pop - Blizzard Castle 3 

Getting Behind The Waterfall - Level 1-5:
Use Richie to get behind The Waterfall by using the purple egg with stripes.

Attack With Your Partners:
Push the X button, to attack with your partners.