Note the color of the pellets when you have the Pikmin carry them to their "Onions." The destination that Pikmin will carry objects to depends on the members of the group. If there are more blue Pikmin than red Pikmin in the group, they will bring it to the blue hive. When the same color pellet is brought to the corresponding hive color it will produce more new Pikmin than if the colors does not match.

Use the following trick to get 600 Pikmin in nine days. Before doing this, getting lots of ship parts in as little days as possible.Go to the first level and have at least 30 Blue Pikmin. Go up the bow ramp and break down the wall. You will see clams. Go up to attack them and get the pearl. Do this repeatedly, then keep doing it for nine days.