To get the crystal shard you're asking about, you need Stone-Cutter ability. You will get this power in the level; get cutter ability from a kapar, get to the cairn in the level, and mix the abilities, which I'm sure you know how to do that. Once you beat Giga-Kapar, you fall a great distance, and hit ground. Walk right up next to a brown-and-green wall and use your great stone-cutting skills. Jump up to another platform, and transform into the stone hamster, Rick. Walk to the wall and start climbing by holding left while pressing the A button. Pressing A rapidly gets you nowhere. Space out your jumps, and climb to the crystal shard. Sound hard? Not really. Go to it, and be glad that you're a Kirby fan! Adios!