I just figured out how to beat this dungeon, MUWAHAHAHAHA! Raltz after Shelos is done investigating the magic out of those runes create a sphere of air for the pokemon that can't breathe in water, then me and the other water types will blast the wall with a massive amount of water behind it, the sheer water pressure should be enough to blast the crap out of the rock and destroy it or move it, then the water should drain into the lower floors and clear any obstacles we may face, one the water is drained out of this room, by either going into the floors below or Shelos using Storm Drain we can clear the next floors easily! Who's with me on this?