Rock Locations
I know it's an old topic, but it maybe helps other players.
Sunny Hill - 2 rocks, one that blocks the treasure chest and one at the end that blocks 2 chests
Marino Strada - 1 rock at the end that just lead to a fishing place for some rare fishes
Dragonbone Hill - 1 rock blocks the cave entrance to a holy beast
Verde Forest - 1 rock at the top left of the last section, unlocks the Dusk Ruins
White Cave - 1 rock direct at the entrance, gives you the chance to fully explore the dungeon
Sunny Hill - 2 rocks, one that blocks the treasure chest and one at the end that blocks 2 chests
Marino Strada - 1 rock at the end that just lead to a fishing place for some rare fishes
Dragonbone Hill - 1 rock blocks the cave entrance to a holy beast
Verde Forest - 1 rock at the top left of the last section, unlocks the Dusk Ruins
White Cave - 1 rock direct at the entrance, gives you the chance to fully explore the dungeon