Stone Change

Stone Change is the main move that Stone Copy Ability allows for Kirby to use. It involves Kirby turning into one of several heavy objects upon use, generally a pink stone sporting tightly-closed eyes, which is the only transformation available in some appearances, typically earlier ones. By using the move in midair, Kirby quickly plummets to the ground, damaging most enemies beneath him.

Stone Change makes its first appearance in Kirby's Adventure, along with its associated ability, but Stone Change did not become a distinct subject until Kirby Super Star. In every Super Smash Bros. series title, it is Kirby's down-special move, made separate from the Stone ability, and is even titled Stone in every installment, giving it even further distiction from the Stone ability.

Super Smash Bros. series
In the Super Smash Bros. series, Stone functions similarly as in the Kirby games. In Super Smash Bros. and Super Smash Bros. Melee, Stone does not affect opponents when used on the ground, though starting with Super Smash Bros. Brawl, any nearby opponents take damage during the transformation. While in the stone form, Kirby is invulnerable to any attack, though unlike in the Kirby games, the transformation is temporary.

In Super Smash Bros., Kirby only transforms into his typical pink stone form. Since Super Smash Bros. Melee, the move can also turn Kirby into one of a few random objects at random a la Kirby Super Star and some later Kirby titles. These other transformations include a "100t" weight based the 8-ton weight transformation from the Kirby franchise, a Thwomp (using its Super Mario 64 design up until Super Smash Bros. for Nintendo 3DS / Wii U, in which it is updated to its modern, spiked design), a spiked ball, a Garbage Block from Panel de Pon. In Super Smash Bros. Ultimate, the Stone move adds a shrine treasure chest from The Legend of Zelda: Breath of the Wild as another transformation.

In Super Smash Bros. for Nintendo 3DS / Wii U, the first custom variant for this move is Grounding Stone, which has a longer transformation time but buries opponents when landing on them from the air. The second variant, Meteor Stone, meteor smashes opponents that Kirby hits, but the time it takes for Kirby to turn back is increased.