Pokémon Go Halloween event dresses up Pikachu in a Mimikyu costume
Costumed Pokémon available in raids.
Pokémon Go's annual Halloween event begins this Thursday, 17th October at 9pm UK time (1pm Pacific).
It will feature the release of creepy new Gen 5 Pokémon Yamask, (which evolves into spooky sarcophagus Pokémon Cofagrigus), and which will be available Shiny.
Legendary Pokémon Darkrei will make its debut in Tier 5 raids, meanwhile.
There will be a new set of Special Research to complete, which will again reward the Halloween-exclusive Spiritomb.
And another round of Shadow Pokémon will be available from Team Rocket PokéStops: Weedle, Kakuna, Beedrill, Electabuzz, Magmar, Lapras, Mareep, Seedot, Nuzleaf, Sableye, Trapinch, Cacnea, Shuppet, and Duskull.
But perhaps the most eye-catching releases of the event are the new costumed forms of Pikachu, Bulbasaur, Charmander and Squirtle. These will be available in shiny forms as well.
Bulbasaur wears a Shedninja costume, Charmander wears a Cubone outfit, and Squirtle wears a Yamask hat. These will be available in raids - the first costumed Pokémon to be made available this way.
In the wild, you'll find Pikachu wearing a Mimikyu costume. Which is, of course, a little Inception-y - as Mimikyu is itself wearing a costume of Pikachu.
Lastly, there will be new regular research tasks, more avatar items, plus double candy when catching, hatching and transferring Pokémon.