The SpongeBob SquarePants Movie Hints for GameCube
Hit the toast in the toaster at the beginning through the guitar wave challenge. Then, once you lose (because you hit the toast instead of the rings) you will be back at the challenge. Behind you, if you jump up, there is also a toaster around here. Hit that one too. (I think there MIGHT be a 3rd toaster) an extra will appear.