Pikmin Evolution/Dens

Dens are subp-areas found in Pikmin Evolution, they are similiar in concept to Pikmin 2's cave system where you take a squad of Pikmin and explore a multifloor area of usually, but not always, ending in a boss fight. Each floor often is limited in size and contains a predetermined set of hazards and enemies, with some dens being designed around a certain theme such as food or toys, or being themed around a certain type of enemy such as the Bulborb. Dens differ from caves in that while some dens take the form of a downward cave that contains a fan leading you back where you came, some take the form of vertical tower where the end goal becomes heading to the top of tower and riding a balloon back to where you came.