Hey all you guy that keep saying that the white door is for un locking characters i've got something to tell you guys:YOU'R WRONG. the white door is used to get a power star. to get the power star you must first collect or capture all the white rabbits the after you catch the last white rabbit he say's"let go of me here you can have this key now leave me alone" then go to the white door,use the key and and walla you get a power star butt if you try to go back in your going to hear some boo's laughing and then your gonna come back out so that means that the white door can only be used once to get a power star so there. happy