Tak and the Power of Juju cheats and cheat codes for Gamecube

Unlock Concept Art in Extras menu
Collect all twelve plants

Unlock Story Boards
Collect 200 yorbels.

Pause while playing and enter the following button combinations:

Unlock all extras:
LEFT, RIGHT, B, B, X, X, LEFT, RIGHT
or B, X, Y, Y, B, X, Y, Y

Unlock all plants:
B, Y, X, LEFT, UP, RIGHT, DOWN, DOWN.

Unlock all moonstones:
Y, Y, B, B, X, X, LEFT, RIGHT

Unlock all movies:
LEFT, RIGHT, B, B, X, X, LEFT, RIGHT

All Yorbels cheat at the extras menu:
Up, Y, Left, B, Right, X, Down, Up

Unlock all Juju powers:
UP, RIGHT, LEFT, DOWN, Y, X, B, DOWN

Earn 100 feathers:
B, Y, X, B, Y, X, B, Y