Instructions
Play through the Red Desert level until you defeat all of the Red Knights that attempt to pull Alice into a vortex. A white line of ribbon will appear that will show you where to go next. Follow the ribbon until you reach a twister.
Press "C" to switch to McTwisp, otherwise known as the White Rabbit. Move the cursor over the twister, and you'll see a blue glow. Press and hold the "Z" button to freeze the twister, and continue following the white line. Follow it all the way to the broken bridge, smashing through obstacles and treasure chests along the way.
Hold "Z" on the ribbons that are blowing in the wind on either side of the gorge to freeze them in place. Switch to the March Hare, and hold "Z" while your cursor is on the Mad Hatter's podium, near the broken bridge, to move the podium.
Press and hold "Z" again on the podium after you move it to raise it up out of the sand. Switch to the Mad Hatter, and stand on the raised podium. Hold the "Z" button, and use the Wiimote to line up the two frozen ribbon strands. Release the "Z" button, and the strands will join together, bringing the two sections of desert together.
Follow the ribbon forward, and defeat the three Red Knights that appear. Continue following the ribbon until you reach a door. Press "B" to enter the door and Chessur will be unlocked when you start the next level.