10 questions · hard · Trivia quiz · Pokémon
A whole quiz built out of singletons: the only Fire/Water-type, the only Mythical that evolves, the only Pokémon running on a single hit point. Each of these claims is the kind that starts arguments, so each one is the verified kind. If a category has exactly one member in nine generations of games, it is probably in here, being asked about carefully.