Husky is a special skin that was included as part of the Legendary Pack in mid November 2017. Legendary was one of the three packs available in the occasional release of the Booster Pack offer.
Husky could be purchased for $19.99 as part of the Legendary Pack. This pack also included 50000 coins, a Mass Boost (3X, 24H) and a XP Boost (3X, 24H). Husky was not available for individual purchase and may not be available for purchase in the future.
Details of this offer may vary depending on location and platform.