You know what I want to see? Pokemon Anime style gym battles. Here's what I mean by this:
-The game has you choose the three Pokemon you want to use for the battle. If you only have two then you have to use only the two you have and so on.
-No items allowed.
-Force a set battle system.
Anime style regional tournament with the same rules for the right to battle the Elite 4. The battle the Elite 4 the same way but in 6 on 6 battles. To balance it, the game heals your pokemon after each battle in the tournament and Elite 4 but allow the player to toggle it off (if it's possible of course) if they want an added challenge.
Thats a pretty good idea. And shouldn't be to hard to implement