A common copy ability throughout the Kirby series that lets Kirby turn into a hard block of stone.
This form's design has varied over the years, but in its modern form, Kirby wears rocks on his head and a multicolored headband that comes in purple, pink, and orange, alongside a pair of white horns. In its older forms, Kirby's skin would turn brown or grey and he would wear a blue helmet with a red ribbon at the end like a tail.
This tag implicates kirby (learn more).