From Pikipedia, the Pikmin wiki
The Crystallized Clairvoyance (チャネリング・クリスタル?) is a treasure found in Pikmin 2. It is a large marble with a blue cat's-eye pattern. This item is found on Sublevel 5 of the Snagret Hole, and is held by one of the many Dwarf Orange Bulborbs that fall from the sky. To get the treasure, search very hard to find the correct one, or stop the Antenna Beetle so the Treasure Gauge shows the exact location of the Dwarf Bulborb that has the treasure.
In 2-Player Battle
In 2-Player Battle, this treasure is the key marble that belongs to Louie and the Blue Pikmin. It only weighs one unit, and if his opponent, Captain Olimar and the Red Pikmin, carry this to their Onion, they will automatically win. If Louie gets a cherry, and lands on the correct roulette panel, he'll be able to make the marble jump all the way back to his base, preventing his opponent from stealing it.
“Trying to sort out the five different colors of Pikmin is giving me a headache. I'll be a much better tactician if I take a moment to study each Pikmin's unique abilities.
*Red Pikmin: Immune to fire.
*Purple Pikmin: Strong and heavy bruisers that can lift big loads.
*White Pikmin: Fast and immune to the effects of poison. Can also find hidden treasures buried underground.
*Yellow Pikmin: Highly agile and immune to electrical damage. Also fly high when thrown.
*Blue Pikmin: Thrive in water.Phew! It should be easy to identify each Pikmin's abilities based on their color.”
“This mystic crystal has the ability to channel energy between this world and the next. This spiritual connectivity will act as a life navigator for a positive existence.”
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