Ratatouille Cheats for GameCube

At the 'Main' menu select 'Extras'. Then go to Gusteau's Shop and select 'Secrets' and enter the following passwords (without the quotes) to unlock the corresponding effect in the game.
Unlock Very Easy Difficulty:
Enter the pasword 'Pieceocake'
Get +5,000 Gusteau Points:
Enter the pasword 'Gusteaupot'
Get +10,000 Gusteau Points:
Enter the pasword 'Gusteaujack'
Get +50,000 Gusteau Points
Enter the pasword 'Gusteauomni'
Unlock ALL Dream Worlds in Gusteau's Shop:
Enter the pasword 'Gusteaudream'
Unlock ALL Slides in Gusteau's Shop:
Enter the pasword 'Gusteauslide'
Unlock ALL 4 championship Modes:
Enter the pasword 'Gusteauship'
Unlock ALL Items in Gusteau's Shop:
Enter the pasword 'Gusteaucombo'
Unlock Multiplayer Mode:
Enter the pasword 'Slumberparty'
Unlock ALL Single-Player and Multiplayer Mini-Games:
Enter the pasword 'Mattelme'
Unlock ALL Single-Player Mini-Games:
Enter the pasword 'Gusteaulevel'
Fart when Jumping:
Enter the pasword 'Ilikeonions'
Head Butt instead of Tailswipe when Attacking :
Enter the pasword 'Hardfeelings'
Move Undetected by Enemies:
Enter the pasword 'Spyagent'
No Damage from Enemies:
Enter the pasword 'Shielded'
No Impact or Damage from Enemies:
Enter the pasword 'Myhero'
Unlock ALL Bonus Artworks:
Enter the pasword 'Gusteaures'
Unlock ALL Concept Art:
Enter the pasword 'Gusteauart'
Unlock ALL Videos:
Enter the pasword 'Gusteauvid'