From Pikmin Fanon
This article relates to the official games. See Pikipedia's "boulder" article for more official information.
Boulder The icon used to represent this obstacle.
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Appearance in Pikmin 3.

Boulders are obstacles appearing as large rocks that can crush anything they land on or roll over. They can fall from above and be produced or utilized by enemies. In Pikmin 2, boulders appear in some caves. In Pikmin 3, boulders fall faster than those in Pikmin 2, and Rock Pikmin are immune to being crushed by them.

In fanon games

Below this point is where users place their version of boulders.

In Pikmin: Decayed Leaf

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"You… your evil subordinate, your greedy boss, and this invasive Pikmin infestation will all die here TODAY!!"
This article or section presents information pertaining to Pikmin: Decayed Leaf, a fanon game created by Soundwave.
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The boulder is a returning obstacle in Pikmin: Decayed Leaf. The large rock has not changed much, being spat out by Lithopods and falling from the ceilings of caves. However, many more enemies and obstacles utilize boulders, like the Revengeful Crawbster or acoustic wall. Although the boulder can crush pretty much any Pikmin type, Rock Pikmin and Weighted Pikmin are not harmed by the large rock, and are merely flattened by it.

In Pikmin: Shipwrecked Stargazers

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Shipwrecked Stargazers
This article or section presents information pertaining to Pikmin: Shipwrecked Stargazers, a fanon game created by CarrotStilts1.
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In Pikmin: Shipwrecked Stargazers, boulders are primarily spat out by members of the lithopod family, including a new variant covered in tar that is utilized by the Tropical Cannon Beetle and its larvae. The falling variation is much more uncommon than in Pikmin 2, and usually appears as a direct result of a particularly powerful enemy attack. The Freshwater Ribbifin can make boulders fall during its rematch in Gladiator's Gulch. In Desperado Ditch, detonating dynamite through the use of plunger boxes often makes boulders fall from the ceiling, especially if the dynamite opens a hole that lets light into the cave.