A Frosty Creature
A mysterious Pokémon has recently been seen in Emera Town. It's said to cover everything in its surroundings in frozen ice.
The Frosty Creature is a Kyurem. This event started the 4th of December.
Kyurem was then once again obtainable from the 6th of January 2015
Obtaining Kyurem
Kyurem can be obtained by interacting with Eggs & Pokemon. An icon of Kyurem will randomly appear on your userbar while interacting. If you see the icon, you can click on it to get the egg, provided you have a free space in your party to obtain the egg, but if you don't, you always have time to make space. Note that it is not required to ave a free slot in the party for it to appear in the userbar.
Receiving Kyurem
After clicking the Kyurem on your userbar, it will show you a clearer image of it, and will ask you if you want to claim the gift.
After accepting the creature's gift, you will have a Kyurem Egg in your party.