Bloatstool

The Bloatstool is a species of sporovid that has a thick, impenetrable hide.

=In fanon games=

In Pikmin Evolution
The Bloatstool is a species of stationary sprovid appearing in Pikmin Evolution. It has a similar appearance to typical members of its species, but it lacks any legs and has a massive segmented cap that, depending on its location, is either red or purple. The red caps are more translucent and gelatinous while the purple ones are more opaque and solid. The Bloatstool is mainly found in dens, most commonly in the Cavern of Fangs, Slumbering Meadows, and Melancholy Castle, but can be found in some parts of the surface, acting as an annoyance no matter where it is found. It lacks any movement ability but compensates for this flaw by being almost invincible. The cap of the Bloatstool surrounds the entire creature, meaning no attack can actually damage it. Rather, any Pikmin that tries to attack will just harmlessly rebound off the sporovid's cap.

Bloastools are less like enemies and more like harmless obstacles in that must be worked around. Bloatstools are often stationed in corridors, making them practically inaccessible. Red-capped Bloatstools are the more common of the two types. Their gelatinous cap makes them susceptible to being frozen, such as by a cyan syrup, thereby rendering them destructible. While red-capped Bloatstools are almost always found protruding from the ground already, in the Melancholy Castle, they only become active when the Waterwraith appears, making hiding from it more difficult by preventing access to most of a sublevel's passages. Purple-capped Bloatstools only appear in the Slumbering Meadows and the Cavern of Fangs. At first, in Slumbering Meadows, they appear deflated and resemble tarps, but are shown to be sensitive to sound in that, when exposed to a loud noise such as the call of a Warbling Phosbat, they inflate and will only deflate when all active enemies alerted by the call return to their normal behaviors. Unlike the red-capped Bloatstools, purple-capped Bloatstools can't be destroyed under any circumstances except by the Shadegrubs in the Cavern of Fangs, where they are always active. Overall, the Bloatstools are more nuisances than dangers, but the way they behave can be quite detrimental.