A new Halloween-themed event is now underway in Pokémon Shuffle for two weeks, leading up to Halloween day. Halloween-inspired stages will be featured in the game every weekday until then, including Sableye (Spooky), Pikachu (Spooky), Pumpkaboo (Spooky), Gourgeist (Spooky) and Gengar (Spooky). These stages will cycle around in that particular order from Monday through Friday.
Halloween event now underway in Pokémon Shuffle featuring spooky Sableye, Pikachu, Pumpkaboo, Gourgeist and Gengar stages
Pokémon Blog 