Halloween is creeping into Pokémon Sleep and Greengrass Isle is getting spooky with some fun new additions. Starting October 28th at 4:00 am, the island will be alive with double candies and lots of other exciting stuff. Keep reading to find out all about it.The Pokémon Sleep Halloween Is Running Until November 4thYou’ll get to spot the Ghost-type Pokémon during this Halloween in Pokémon Sleep. You’ll see Gengar, Drifblim and Skeledirge haunting Greengrass Isle. Ghost-types are way more likely to show up overall.Each time one of the spooky helpers drops off ingredients, they’ll give you an extra, and their main skills get a 1.5x boost. Snorlax on Greengrass Isle is also getting in on the fun. It turns out he’s developing a taste for Bluk Berries, which happen to be Ghost-type favourites.And the most exciting part of the Pokémon Sleep Halloween event is the debut of Mimikyu and Pikachu in a cute little purple hat. From October 28th (3:00 pm), you can catch Mimikyu on Greengrass Isle and the Old Gold Power Plant.Mimikyu’s sleep type is Dozing, and its main skill is Disguise (Berry Burst) which is hoarding Berries. It grabs a set amount of Berries plus a few extras that your other team members collect. And if you’re lucky enough to hit a Great Success, you’ll end up with a bunch more Berries than usual.Halloween Pikachu is back, too, rocking a new purple hat. To help track him down, you can use Pikachu (Halloween) Incense, which you can earn by completing limited-time missions. There’s also a chance you’ll encounter the Pikachu from last year’s Halloween event during sleep research.October 31st and November 3rd are extra special because you’ll earn three times the normal amount of candies for the first sleep research of the day. If you’re looking to maximize your haul, just keep in mind that these event bonuses only work in the event area and only for sleep data tracked during the event.So, grab Pokémon Sleep from the Google Play Store and gear up for the Halloween event.Be sure to read our scoop on League Of Legends: Wild Rift’s 4th Anniversary With New Champions And Events.