I don't get this at all - the sinnoh pokedex says drapion is a bug and poison type because Aaron (bug type elite 4) has one, but the Unova pokedex says its a dark and poison type because Grimsley has it?
Drapion is a Dark/Poison type. Aaron doesn't have to have all Bug types, as Flint has a Lopunny and Steelix. Drapion is similar to a bug and is in the Bug egg group.
well Drapion is a bug just not bug type
its a scorpion and it evolves from the bug/poison Skorupi
also Drapion is in the Bug Egg group