Eternal Cavern

Eternal Cavern is the third cave you'll enter in Freaky Forest in the game Pikmin:The After Years. This is a tough cave with a lot of tough enemies. There is an easily recognizable boss on the final sublevel. There are 10 sublevels with 15 treasures located here. What makes this cave unique is that there is that you need to kill every enemy in the cave in order to proceed deeper down.

Enemies

 * Dwarf Orange Bulborb
 * Dwarf Bulbear
 * Dwarf Red Bulborb
 * Crockle
 * Stingerr
 * Beevus
 * Mamuta
 * Rainwisp
 * Honeywisp
 * Gatling Groink
 * Enraged Groink
 * Enraged Dirigibug
 * Toxic Dirigibug
 * Chemical Goolix
 * Dark Spitter
 * Creeping Chrysanthemum
 * Creeping Glowcap
 * Eyevine
 * Blind Wollywog
 * Green Wollywog
 * Overcharge Blowhog
 * Puffy Blowhog
 * Raging Long Legs
 * Beady Long Legs
 * Burrowing Snagret
 * Proggling
 * Boss Smoky Progg

After defeated, the Smoky Progg will give you the Laminated Sheet.

-- Gamefreak75