Beginner's Boulder

The first dungeon in Pikmin: The Mystery Potion, it has many weaker enemies, but the fifth time you enter, a new enemy appears, and it is very, very strong.

F1
1x Dwarf Pufferspine

3x Dwarf Red Bulborb

F2
5x Dwarf Red Bulborb

Spoliotoniumite Bottles
There are two, each one if found by deafeating all enemies on that specific floor.