Can we put suggestions in here? If that question has already been answered, then disregard it.
I would definitely like to see a battle where two people can battle two people. Not a double battle, But a battle with Separate Trainers.
E.G: King + Colin vs Bearzy + Earthworm.
You each have your own side of the screen, but you share it with your partner. Your partner doesn't know your pokemon, and You don't know his. You basically have 12 pokemon Vs. 12 pokemon. I don't know how long that would take, and how you would be able to register a partner for it, but I like the idea a lot. It reminds me of how in pokemon emerald where you fight with a partner, whom I forgot the name of.
I'd like to see it, but again it's just my suggestion, and if it is a bad one, then I am sorry.