From Zelda Legends Wiki
Rolling Bones is the first Miniboss in Link's Awakening. He attacks by shoving a spiked log, the width of the screen, in Link's direction, which Link must evade by using the Roc's Feather. He also appears much later in the Turtle Rock dungeon as one of the numerous recurring minnibosses. At this point, if the player has the boomerang, he can dispatch Rolling Bones with one hit.