Gengar

Gengar is a Ghost-Poison dual-type that's been a fixture since Generation I. It's one of the most recognizable Pokémon in the franchise—the kind of name casual players know even if they've never touched a card. Creepy, competitive in the games, and visually distinct. Gengar has the staying power of a legacy asset. In the TCG, Gengar pulls consistently across print eras because of that name recognition and competitive history. It shows up regularly in set distributions and has never been relegated to ultra-rare status, which means supply is steady but demand stays solid. For speculators, it's the reliable play—not a lottery ticket, but a Pokémon that moves because people actually want to own it.