First, you need to all of the color Pikmin. Then go to the very first stage. From your space shudle, take out 28 yellow pikmin. Next, go to the cardboard box and get three of your yellow pikmin, and make them each pick up a bomb rock. After that, go to the stream. Then, when you get there throw all three of the yellow pikmin with bomb rocks into the stream. Next, when the night is over go into your space ships. After that, go back there in the morning and call the three yellow pikmin out of the water. Then they should be all purple. That was my hint for this day on Pikmin!