In addition of extending the Liberty Pass Event, Pokemon and Nintendo will have a new event starting April 27th that gives Pokemon players a chance to download a Secret Egg.
Starting April 27th through May 31st, Toys R Us will have an event where players can download the Secret Egg via the Mystery Gift. The Secret Egg will contain a Pokemon that maybe rare but similar as to what Japan did, it may contain a Pidove. Who knows?
The Pokemon Secret Egg event will only apply for players who have Pokemon Black and White versions.