Halloween Haunts with Gengar , This spooky season, were spotlighting not one but two hauntingly rare Gengar cards graded by DSG! First up, we have a 2004 FireRed & LeafGreen Gengar EXfirst Rare Pokmon Halloween Card: What You Need to Know Before Buying the Trick or Trade Booster Bundle Pokmon Halloween Trick Or Trade Mewtwo Holo Mercari Rare Pokmon Halloween Card: What You Need to Know Before Buying the Trick or Trade Booster Pokemon Cards Halloween Stamped Pumpkaboo Mercari