|“||Cairns are piles of three rocks that sit in one location and bounce in a series of three jumps, with the third being the highest. Be careful when throwing a power star at Cairns—they may jump up as you throw, allowing the star to pass harmlessly underneath them.”|
|— Description • Kirby 64: The Crystal Shards Official Strategy Guide (Prima)|
Cairn's body consists of three rocks, each one stacked on top of one another. Each of the three rocks Cairn is composed of is a different color: the bottom rock is greenish-brown, the middle is maize, and the top is red. The three rocks are also different sizes; the bottom is the largest while the top is the smallest. The top rock also has a pair of black eyes, making this enemy somewhat resemble a stone snowman.
Cairn makes its only appearance in this game. It simply jumps up and down. When picked up and thrown by Kirby, it scatters its pieces, the biggest piece getting thrown the nearest and the smallest piece the furthest. It gives the Stone ability when it is inhaled.
Cairn's English name comes from the word, "cairn," which is a pile of stones set as a gravestone, monument, altar, or landmark.
Its Japanese name, ゴロピョン (Goropyon), is a portmanteau of the onomatopoeia for a large rolling object, ゴロゴロ/ごろごろ (Gorogoro); and the onomatopoeia for hopping, ピョンピョン/ぴょんぴょん (pyonpyon).