SunGold and MoonSilver might be a good idea, if you did want to try them. You could always do an unofficial playthrough of it since hacks aren't in your rules. :)
Cool. ^^ I should try one of those sometime(though it is a hack so it's against my current rules). Since I don't have a Duplicates Clause in my challenge it appears that I'm going to have a lot of Rattata and Pidgey. xD