Trainers hoping to mix up their competitive battling even more can now pick up four Mega Stones for their Pokémon Sun and Moon games through Mystery Gift. The code needed for these stones is AZUL and will give players access to Mega Stones for Pidgeot, Heracross, Steelix and Houndoom. None of these Pokémon are available in the wilds of the Alola region so players will either have to transfer these Pokémon through the PokéBank or try trading with other trainers to add them to their team. This is the only way to get access to these four Mega Stones, so be sure to pick them up and add them to the collection.
For more details on the distribution you can check out the official site right here.