Spiked stone

Spiked stones, also described as "weights" and spiked blocks, are angry-faced weapons similar to Thwomps, appearing on the final pages in Yoshi's Story, where they are carried by the Black Shy Guys inside Bowser's Castle. If a Yoshi walks near a Black Shy Guy, it will release the spiked stone, which will crush whatever is beneath it. Spiked stones appear in the levels Lift Castle, Ghost Castle, and Mecha Castle.