I for one, would love to see a way that would allow you to have a pokemon follow you outside it's pokeball and the team photography like in HG/SS. Also, I would love to see an alternate system, in parallel, to trading, like a Donation System, that would allow a trainer to trade a pokemon without getting anything in return as a gesture of goodwill from the giver, that way, the Receiver Trainer wouldn't have to spend resources, like pokeballs or other battle intervinient items he/she might need in the future, for just capturing a filler pokemon and trade it for the one he/she wants from the Giver Trainer, that way the Giver wouldn't be filling up his/her PC boxes, and to this maybe there could be a NPC that would reward the player with an item from a wide variety of them as a token of amazement, and a "Pokemon For An Item" choice of trading, literally trading a pokemon for an item. Gotta get my hands on a 3DS, though.