Tak and the Power of Juju Cheat Codes for Gamecube

Get all yorbels
Hit pause then up, Y, left, B, right, X, down, up.

Get all concept art
Get all twelve plants then go to the extras menu.

View movies again
After you've seen a movie once, you can view it again from the extras menu.

Unlock storyboards
Get 200 yorbels.

Unlock all extras
Hit pause then Left, Right, B, B, X, X, Left, Right, OR B, X, Y, Y, B, X, Y, Y.

Unlock all plants
Hit pause then B, Y, X, left, up, right, down, down.

Unlock all moonstones
Hit pause then Y, Y, B, B, X, X, Left, Right.

Unlock all Juju powers
Hit pause then up, right, left, down, Y, X, B, down.

Get 100 feathers
Hit pause then B, Y, X, B, Y, X, B, Y.

Unlock all movies
Hit pause then left, right, B, B, X, X, left, right.