Where are the mega stones for Metagross(ruin), Lucario and Lopunny? (All deltas)
Metagrossite is in the dragon ruins. Idk that lopunnite has been found. lucarionite is on the wiki or the collab in here.
Lopunnite can be bought at narra town.
Delta loppunite can be found in Holon Jungle. I think delta lucarionite can be found in holon pyramid.