In each sublevel, a time limit is given, within which you must advance to the next sublevel or fail the challenge. Being awarded a White Flower upon completion means that one or more Pikmin has died, while a no-death completion earns a Pink Flower. A widely held misconception is that in order to beat challenge mode, one must collect all the treasures and have no pikmin losses - but only the key on each level is required. To unlock a special cutscene with Louie you must complete the challenge mode with all pink flowers.