What would be the ultimate Pokemon game?

Open-world, like Skyrim?
How would you change the battles?
How do you feel about 3d v. Sprites, now that they've both been done?
What changes did X/Y bring that you liked, disliked, etc.
What kind of things do you want a dex to base pokemon have that havent been done

all that stuff.
ITT: THe perfect pokemon game general