Pokemon Go will be making certain Pokemon easier to catch during their special Halloween event. From October 26th to November 1st you'll be able to catch Ghastly, Haunter, Gengar much easier than you were able to before. In addition to those ghost Pokemon, you'll also be able to catch more Zubat (no thanks), Golbat, Drowzee, and Hypno! In the spirit of Halloween Niantic also promises there will be extra candy bonuses for all.
I've lapsed in my Pokemon Go playing as of late, but it's mostly because I don't have any Pokestops nearby to grab some Pokeballs. I might just have to find some spots to stock up so I can get a Gengar. Have you stopped playing or are you going strong?