From WiKirby, your independent source of Kirby knowledge.
Stone-Ice is a Power Combo in Kirby 64: The Crystal Shards that combines the Stone and Ice abilities. Using this move causes Kirby to transform into a freezing curling stone with a yellow handle and slide across the ground, freezing any enemies he makes contact with. While sliding, Kirby cannot control his movement, and will bounce off walls. He is effectively invulnerable while sliding. To end the move, Kirby must either wait until he comes to a complete stop, or simply use the ability again while sliding.
Like the other abilities in Kirby 64: The Crystal Shards, this ability does not change Kirby's physical appearance in any way until it is used.