What two pokemon games, when combined (you can choose the specific features from each game) create the COOLEST GAME EVER?

I think SoulSilver/HeartGold + Black/White is a first to come to mind.
I want the Pokeatholon, pokemon followers, and more regions per game! But I also enjoy the Unova region and it's content, so putting those feautures together would be great. Ho-Oh and Lugia should be part of the storyline as well.

cant believe this place is still alive