It took quite a long time to select them. Although both Beedrill and Feilang were fairly common Pokémon species, their Mega Stones were by no means common. Even after Professor Sycamore made public the details regarding Mega Evolution, only a small minority of people were able to use it.
Mega Stones and Key Stones were undoubtedly among the top strategic resources. In the Kalos region, from ancient times to the present day, this had always been the case, and very few ever leaked out. The sheer number that Steven managed to gather was something that money alone could never accomplish.
Take Giovanni and Team Rocket, for instance—they hadn't managed to stockpile even a single one.
Chapter 211