Hoopa is finally being distributed via a download event at McDonald's from November 27, 2015 - December 23, 2015. This applies to both Pokemon X/Y and Omega Ruby/Alpha Sapphire. Go to Mystery Gift > Receive via Internet once connected to McDonald's wi-fi.

Also, tomorrow is the last day to get Serperior, Emboar, and Samurott for Omega Ruby/Alpha Sapphire. Get these via Mystery Gift > Code (codes are POKEMON497, POKEMON500, POKEMON503).