All of the Mega Stone codes will stop working at 23.59 UTC on October 31st, 2017. We finally have an end date for the giveaways now, and it's a little closer than we thought. When does the Houndoominite, Heracronite, Steelixite, and Pidgeotite Mega Stone giveaway end?
Here's how, exactly, to download the Mega Stones in question via Mystery Gift:
Mega Houndoom, Mega Heracross, Mega Steelix, Mega Pidgeot Mega Stones code: AZUL.Rather than using a QR code, like has been done before with giveaways like that of the mythical Pokémon Magearna, the distrubution event for Houndoominite, Heracronite, Steelixite, and Pidgeotite works like the one for Marshadow, with it being tackled via a download code for a Mystery Gift. Watch on YouTube Do Pokémon Sun and Moon finally prove a weird fan theory? Mega Houndoom, Mega Pidgeot, Mega Steelix, and Mega Heracross download codes for Pokémon Sun and Moon