Niantic launched their second Halloween event earlier today and this time they added new Pokémon to experience, a new Pikachu celebrating in a new costume, a new hat for your avatar, and plenty more. The Halloween event starts on October 20th at 12:00 P.M. PDT and run until November 2 at 1:00 P.M. PDT.
Sableye, Banette, and a few other Ghost-type Pokémon originally discovered in the Hoenn region will be making their first-ever appearance in Pokémon GO. The rest of the Pokémon first seen in the Pokémon Ruby and Pokémon Sapphire video games will slowly start arriving in December.
Look out for the new Mimikyu’s Disguise Hat so your avatar can dress for the occasion. Candy rewards from catching, hatching, and transferring Pokémon will be doubled and buddy will find Candy twice as fast during the Halloween event. Lastly, players can open special boxes from the in-game shop. These boxes features items such as Raid Passes and Super Incubators.
Source: Niantic