Gnarly Grotto

Gnarly Grotto is most likely the last cave you'll enter in Frozen Plains in the game Pikmin:The After Years. It is a really tough level with a really tough boss that is easily recognized. There are 13 sublevels and 21 treasures locatd here.

Enemies

 * Ice Glorb
 * Black Glorb
 * Bomborb
 * Volatile Dweevil
 * Volatile Armored Cannon Beetle
 * Volatile Armored Cannon Beetle Larva
 * Decorated Cannon Beetle
 * Ice Shooter
 * Chilling Mamuta
 * Gambler Clamclamp
 * Luminous Spectralids
 * Unmarked Spectralids
 * Burrowing Snarrow
 * Burrowing Snagret
 * Screeching Blowhog
 * Screeching Chrysanthemum
 * Snoring Chrysanthemum
 * Chemical Goolix
 * Sticky Goolix
 * Boss Pileated Snagret

Once defeated, the Pileated Snagret will give you the Luminous Sphere.

-- Gamefreak75