Dirt Den
From Pikmin Fanon
A cave in the Granite Outpost. A very "Dirt"y cave, BADUM TISH, dirt covers the walls and the roof. Bring reds and if you have them, yellows. Oh, and the boss is the Muddrud.
Floor 1
3x Dirtruds
2x Dustruds
Floor 2
Miniboss: Clayrud
Floor 3
5x Dustruds
Floor 4
Boss: Muddrud
Spoliotoniumite Bottles
One is on every floor, held by a specific enemy.