The Pokémon GO Halloween 2017 celebration is currently underway, marking your very first chance to encounter Pokémon that were originally found in the Hoenn region of Pokémon Ruby and Pokémon Sapphire, including Sableye, Banette and others. They are joined by more spooky Pokémon such as Gastly, Cubone, and Drowzee in greater numbers when you head out into your neighborhood. You may also want to keep an eye out for a special costume-wearing Pikachu for a limited time. During the Pokémon GO Halloween event, all Candy rewards (except for Rare Candies) are doubled as well, and there are opportunities to stock up on supplies with discounted special boxes in the in-game shop. The Pokémon GO Halloween event officially began on October 20 and runs until tomorrow, November 2, at 1 p.m. PDT.