Instructions
Press "C" when you encounter an angry tree to swap characters. Continue pressing "C" until you've selected the White Rabbit.
Use your Wii remote to aim at a tree monster. It will begin to emanate a blue glow.
Press and hold the "Z" button to freeze the swiping tree in time. While holding "Z," proceed past the tree unhindered.
Release the "Z" button and continue on your way when you are past the tree.