During gameplay, enter left, right, square, square, circle, circle, left, right.

To activate go to the extras menu.

All Moonstones
Triangle, Triangle, Square, Square, Circle, Circle, Left, Right

All Juju Power-Ups
Up, Right, Left, Down, Triangle, Circle, Square, Down

All Yorbels
Up, Triangle, Left, Square, Right, Circle, Down, Up

Unlock All
Left, Right, Square, Square, Circle, Circle, Left, Right

All Plants
Sqaure, Triangle, Circle, Left, Up, Right, Down, Down

100 Feathers
Square, Triangle, Circle, Square, Triangle, Circle, Square, Triangle

Unlock Story Boards
To unlock the Story Boards, collect 200 yorbels.

Unlock Movies
Once you see a movie in-game, it will be available for viewing in the Extras menu.

Unlock Concept Art
Collect all twelve plants to unlock the Concept Art, which can be found in the Extras menu.

the way you hit the plant is that you jump with x with your special you get.

As soon as you press x you have to press square and hold on to spin attak the plant when it is swinging it's thorny vines.

If you weaken it alot with hits you do it will freeze for a second which gives you the perfect chance to go away before he does this attack that can hurt you alot!

Oh to get the special stick out you must press R1 to switch between sticks. Each time you hit it the plant will swing the vines faster.
Peace from:TAKmaster3000