Charlie And The Chocolate Factory cheats and cheat codes for Gamecube

Candipult:
Hit Y when near of the candipult. Rotate them by using the Analog-stick.
Hit Y again to set it.

Getting Augustus out of the pipe:
Find 2 Oompa-Loompas, then go to the stairs. There are some machines.
Order the Oompa-Loompas to work.

Unlock 3 bonus missions and "Bonus" option at the main menu:
Finish the game once.