Mega Stone Gift: Pidgeotite, Steelixite, Heracronite and Houndoominite .

This event was given away using a common password AZUL for all regions.
While Pidgeotite and Steelixite were given earlier in March '17,
for the participants of the Regional Rumble: Kanto X Alola (2017 March Competition),
this is the first time that Heracronite and Houndoomite are obtainable for Pokemon Sun & Moon.
 

WC 1611: メガストーン　プレゼント

Pidgeotite         x 1

0x2C Thank you for playing Pokémon! Please pick up your gift from the deliveryman in any Pokémon Center.

Steelixite   x1   Heracronite   x1     Houndoominite   x1

Serial Code  |  May 12 to Oct 31, 2017  |  JP 3DS: SM

Format Ver.1.0.5-2, Post Updated Date:20172509_1725