Caves are places in Pikmin 2 that offer a slightly different play style than normal gameplay. Each level in Pikmin 2 has 3 or 4 caves, and each cave has several sublevels, ranging from just one to over 10. Caves appear as large, raised holes in the ground, with warm, steamy air rising out of their mouths. To enter one, walk up to one and press the A button. You will be brought to a small info screen that shows how many treasures you have retrieved from the cave, and how many there are total. There are also four danger icons, indicating fire, water, electricity, and poison. It is always a good idea to bring pikmin that have resistances to the hazards that are indicated to appear in a cave, or else you may find yourself not being able to advance or collect all of the treasure.
Once you have collected all of the treasure that you can, move on to the next sublevel by entering another hole. Some sublevels also have geysers, or jets of water that you and your pikmin can ride on to return to the surface with all of your treasure. Alternatively, you can choose to escape to the surface via the pause menu, but you will lose any treasure you have collected. Most caves also have a boss on the final sublevel, and the treasure you earn for defeating it is often a practical item from the Explorer's Best Friend Series.
List of Caves
Related Threadscrystal caves - last post by @ Aug 12, 2004
Crystal Caves Please Help Me ! ! ! - last post @ Jul 24, 2003
Crystal caves - last post by @ Aug 24, 2002
Crystal Caves Help - last post @ Dec 5, 2003
That bug thing in crystal caves - last post by @ Jul 28, 2003