From October 26th to November 1st, "spooky" Pokémon like Gastly, Gengar and Golbat will appear much more frequently. In addition, every monster you catch will net you double the number of candies -- six, rather than the standard three. The game's buddy system is also getting a Halloween tweak, with your buddy handing you four candies instead of one every time you walk a pre-set distance. Oh, and Professor Willow will give you two candies for every monster you give up. Best grab a scarf, it's gonna be cold out there.