Dark Den (Pikmin: The Pollution)
From Pikmin Fanon
The Dark Den is the fourth area in Pikmin: The Pollution, and where you find Black Pikmin. It is the only area, other than the Rainy Ravine, to not have 2 Pikmin types found, with only one.
Items
De-Pollutionater Piece - Buried.
Red Berry - Flower near base
Blue Berry - Flower near base
Purple Berry - Flower near base
Gold Berry - Flower on the opposite side of base