Here's the list so far: Code: Megastone: Location: Alakazite Just below the south western most shop in the slateport market. Mawilite Vertandurf town, can only be accessed via a flower-bed on the south western end of route 117 Manectite On the cycling road on the north side there is a path that leads to the right and a trainer standing next to a patch of grass, the mega stone is here. Heracronite In the center of Route 127 there is a small U shaped area that is not water, there are 3 secret base locations here all on the north side, to the southwest there is a corner where two rock faces meet it is here you will find the megastone. Mewtwonite X In the south-west corner of littleroot town. more coming as i find them.