Now that copies are being delivered, let's have a mega stone hunt thread. Post your findings if you're jiggy and hip.

Confirmed : Mega Venusaur, Blastoise, Charizard X/Y, Kangaskhan, Gengar, Gyrados, Mewtwo X/Y, Ampharos, Heracross, Tyrannitar, Blaziken, Mawile, Aggron, Absol, Gardevoir, Abomasnow, Lucario, Galvantula, and Druddigon