Sponge

Sponges are an obstacle that takes the form of a highly absorbent porous object able to intake and store water or other fluids such as acid, poison, lava, or nectar to remove them from the local area. In doing so, the sponge grows, becoming either a large lump or a flat structure that can be used as a makeshift bridge. While the removal of liquid would at first seem beneficial, some nearby objects may react only to exposure to it; Pikmin can be made to attack the sponge to make it release the stored liquid. Depending on the game, some sponges are destructible while others are not.

=In fanon games=

In Pikmin Forever
Sponge bridges are obstacles in Pikmin Forever that consist of an immobile block of stone with a rounded bath sponge resting on top. Blue Pikmin that drink water can deposit water into a sponge bridge, causing it to expand. Once enough water is deposited in a sponge bridge, it will grow to a height that can make it useful as a bridge across a gap. The sponge constantly loses water, so it will not remain expanded for long before needing more. A sponge bridge can require anywhere from twenty to sixty water deposits to reach its maximum size; however, enemies such as a Watery Blowhogs can instantly expand the sponge to full capacity if lured over.

In Pikmin: Spark
Sponges are obstacles and members of the spongefoam family appearing in Pikmin: Spark. They are porous masses with a notable soft texture and are found in most watery areas such as, among other places, Saltwater Glade and Fertile Savanna. They absorb the surrounding water, growing to titanic sizes in certain circumstances and gaining a darker color to notify of this change. Conversely, a filled sponge may be struck by Pikmin to make it release the water it holds, the sponge shrinking and becoming a lighter color in the process. Sponges come in two shapes, square and round: square sponges can be carried by Pikmin, preferably Blue Pikmin, and round sponges can not be moved. Square sponges can be placed in a body of water to absorb its contents to allow safe passage by all Pikmin species by simply walking around it or over it. Sponges square and round are always located where progression is linked to the water level so they may be used to control how much water is present. Unlike square sponges, which are yellow only, round sponges may be either yellow or orange, the orange sponges disintegrating when attacked.