Answered Mega stones

[nature-]

Why the mega Stones don’t don’t come back in shop now everyone need buy them on pokebay and they will run out to so then nobody can get like mega houundoom and mega pidgeot and pokemon vortex v3 you could do that and with the come of v4 its All gone  so can you place it back for a while?

[sportsandmusic69]

With the release of v4, certain Mega Stones were removed from purchase while certain ones were left in the shop. You may find the other Mega Stones as a possible prize drop from Sidequest or even purchase them in the Pokebay from other users, which generally go pretty cheap.