The term refers to a specialized player-versus-player (PvP) format within the mobile game Pokmon GO, specifically occurring during or around the Halloween season. This format restricts eligible Pokmon to those with a maximum Combat Power (CP) significantly lower than that allowed in standard leagues, such as the Great League or Ultra League. Furthermore, the Pokmon permitted are generally limited to those thematically related to Halloween, such as Ghost, Dark, or Poison types.
The significance of this limited-time event lies in its provision of a unique and accessible competitive environment. It enables players with lower-level or less-optimized Pokmon to participate meaningfully in PvP battles, fostering broader engagement. Historically, these themed cups have introduced novel team-building strategies and showcased the viability of Pokmon rarely seen in other competitive formats. The focused selection also encourages players to explore a wider range of Pokmon types and movesets, enhancing their overall game knowledge.