Spark (Wario Land 3)
From the Super Mario Wiki, the Mario encyclopedia
Sparks are small spiked balls in Wario Land 3. They float around with versatility, and can be found near climbable areas and places where an owl is used to fly around in. In either case, touching them will cause Wario to be knocked to the ground below. The sparks are similar in behavior to the Kotsuheri of Wario Land II.