The Pokémon Go Halloween 2026 Part 1 event officially launched worldwide on October 27, 2026, running through November 1 across all active regional servers, introducing exclusive costumed Pokémon variants and innovative floor-based Trick or Treat mechanics for mobile trainers. According to verified reports from Polygon, this annual autumn celebration features specialized field research, boosted Ghost-type encounters, and interactive ground boxes reminiscent of past exploration mechanics. Players navigating the streets will encounter rare spawns like costume Pikachu, Zubat, and Sinistea while capitalizing on double candy rewards. Niantic has structured this update to maintain high engagement metrics leading into the winter season, mirroring major seasonal updates seen in titles highlighted in our [PS Plus October 2026 Lineup: Final 3 Games Added [Confirmed]](/news/ps-plus-october-2026-games-lineup-262) report. Community feedback highlights the seamless integration of environmental props that reward diligent explorers with rare candy, stardust, and mysterious encounter bundles. As trainers grind for shiny variants and complete seasonal Collection Challenges, the developer's attention to player retention strategy remains unprecedented. Furthermore, veteran players are utilizing optimized walking routes and incubation strategies to maximize event bonuses before the switch to Part 2 commences in early November. Elite community leaders stress that tracking spawn tables and utilizing incense during peak hours yields maximum candy efficiency for competitive raid attackers.