Shiny Costume Gengar!!! (Halloween Event)

Pokémon Go' Halloween 2020 Event: Start Time, Research Tasks, Shiny Spiritomb and More

Shiny Spooky Hat Gengar : r/TheSilphRoad

Pokémon Go celebrates Halloween with Darkrai in raids and Pokémon in costumes - Polygon

Pokémon Go Halloween 2023 Part 2 event, Timed Research quest steps - Polygon

Pokémon GO Halloween 2023 Part II: All New and Returning Costume Pokémon, Shiny Debuts, Event Research, and More - Prima Games

THESE SPAWNS WERE NOT ANNOUNCED IN POKEMON GO! Costume Gengar & Drifblim in The Wild/Halloween Event

HALLOWEEN 2020 IS HECTIC! (Shiny Mega Gengar Raids + New Special Research & More!) - Pokemon Go

Shiny Costume Gengar!!! (Halloween Event)

MEGA GENGAR RAID in Pokemon Go - Halloween 2020 Costume Gengar

Pokemon Go Halloween 2023 Part 2 event: Shiny Zorua debut, new costumed Pokemon - Dexerto

Pokémon Go's Halloween event brings Shiny Spiritomb, Galarian Yamask, and costumed Gengar - Polygon

Pokémon GO Halloween 2023 (Part II) Event