The Segmented Crawbster (ゴロムシ?, lit.: "Grounder Bug") is a boss in Pikmin 2. It is the boss of the Cavern of Chaos' final sublevel (10), which is located in the Wistful Wild. This is the only place where it can be found. This crab-like creature has one large arm, and an exceedingly smaller left arm. It also has a rather thick shell protecting it. This creature rolls after the active leader, occasionally crushing Pikmin with its hard shell. If it crashes into a wall, it can cause boulders to fall. It will then struggle to get back up in an upright position, and while doing so will expose its weak spot: its flashing underbelly. Eventually, it will then get back up and swing its large arm around back and forth two or so times and continue its assault.
In order to defeat this creature, it must be lead into a wall while it is rolling. Its rolling is more focused on the active leader, not the Pikmin. There is a slight chance that eggs will drop along with the boulders; these may contain Mitites, sprays, or nectar, and they will usually continue to drop every time the Segmented Crawbster crashes into the walls. After the boulders have fallen, the leader needs to be on either the left or right side of the creature and must throw his Pikmin onto its underside. After enough time has passed, it will get up and swing its bulking arm, which can't kill Pikmin, but does knock off their flowers. Once defeated, the Segmented Crawbster will groan and squeal as it is underbelly explodes violently, spewing goo particles all over the immediate vicinity, before dropping the Silencer.
In terms of which Pikmin are the most effective for defeating the Crawbster, it is advisable to use a group of around 10-15 Purple Pikmin – they must have flowers so they do not lag behind and get crushed. Care must be taken if one is to use them, as if they have lost their flowers due to the arm attack, they will surely be crushed by the roll. However, if few/no Purples are flowers, flower or budded Red Pikmin can do the job, as they have average speed and the second strongest power in the game. A group of 15-25 Red Pikmin is a good number to attack the Crawbster with.
For a speedy completion, the player can dismiss 100 Pikmin near its backside right after it falls from the sky, and then get ready lure it into a wall, away from the Pikmin. Once it hits the wall, the Pikmin that were chasing after it should start attacking at a steady pace.
“This gigantic beast is wrapped in a hard shell. In an atypical evolution, the right front leg of this creature is hypertrophic, taking on the function of an arm, rather than a leg. Its asymmetric physical development is unique in the natural world. One unlucky explorer's incorrect conclusion that this creature adheres to a pattern of peaceful, quiet behavior led to an unfortunate incident. In fact, this beast exhibits intensely hostile, aggressive tendencies, aiming at prey and ramming them at full speed.”
“Dessert meats are all the rage on Hocotate. When the planet's finest chefs hear about the kind of sorbets, pies, and parfaits you can make with the claw meat on this sweet beast, they'll clamor for every morsel we bring home!”
The name "Segmented" comes from the fact that its outer shell is made up of several segments that allow it to bend its body. "Crawbster" is a combination of "crawfish" and "lobster". In Japan, it is called ゴロムシ?, where ゴロ? is "ground ball" or "grounder", which is a baseball term given to a ball that rolls along the ground, and ムシ? is "bug" or "insect". This name refers its ability to roll along the ground.
Its scientific name is Parastacoidea reptantia. In it, reptantia is similar to the Latin reptare, which means "to crawl slowly", perhaps referencing how it non-rolling method of movement is to crawl quite slowly. Internally, this boss is called
Names in other languages