A few brand-new challenges have begun in both Pokémon Shuffle and Pokémon Shuffle Mobile. First, an Incineroar Escalation Battle stage has begun. It lasts until May 16, 2017. Next, a high-speed challenge for Salazzle has also begun. It runs until May 16, 2017. Next, a stage for Alolan Ninetales has also begun. It also runs until May 16, 2017. Finally the Passimian Try ’em’ Items stage has been drawn into the rotation. It runs every other week. In addition, all players can receive Alolan Vulpix as a gift. All of these require the version 1.4.11 to download.
Source: Serebii