pokemonmasater's post in Pokemart was marked as the answer
Hey it's not that way! Pokemart never had all the mega stones, pokeballs,etc. The thing you get is limited and that's to make the importance of sidequests. U can't either get any mega stones rather than the starter's stone and few items like ice stone aren't available too that increases the importance of sidequests and pokebay.
So pokemart is not the best.
Go and buy from pokebay u can get almost everything
pokemonmasater's post in Pokemart was marked as the answer