
Mega Gengar is one of the most dominant control threats in VGC history. Its Shadow Tag ability traps opposing Pokémon on the field, preventing them from switching out. This makes it an exceptional anchor for Perish Song strategies and precise target removal.
Mega Gengar pairs perfectly with pivot support (like Incineroar with Parting Shot) and bulky defensive walls (like Gholdengo or other defensive anchors) that can stall out turns and abuse Fake Out/Protect.
Defeating Mega Gengar requires bypassing its trapping ability.
Basculegion is a premier check, as its Ghost typing makes it immune to Shadow Tag trapping, allowing it to hit Mega Gengar hard with physical moves like Poltergeist.
Incineroar is another key check, utilizing pivot moves like U-turn or Parting Shot to escape its trap while threatening Mega Gengar with Knock Off.
The best moveset for Gengar-Mega in the current competitive meta typically features the moves Protect, Shadow Ball, Perish Song, Sludge Bomb.
In the Pokémon Champions meta, Gengar-Mega can be countered by exploiting its weaknesses (dark 2x, ghost 2x, ground 2x, psychic 2x) and using effective check/counter teams.
The best item for Gengar-Mega is typically Gengarite, based on high-level tournament and ladder stats.