True, otherwise it would have just evolved in Generation I. It's not like an item that has done nothing for it in the past will just suddenly start working. I'm kind of hoping for just a strange evolution method that isn't really either item or location. I liked that rumor for which Pokémon it was (Pancham maybe) of turning the 3DS upside down so the gyroscope recognizes it and evolves it. Something wacky like that would be really cool, plus it'd definitely be an evolution method that the games could explore and use Eevee as the guinea pig for.