General

Is there a reason to keep Traded Pokemon?

So I am doing a lot of Wonder Trading so I can get the Pokemiles.
Sometimes I get doubles of Pokemon or when I get a Pokemon in the same region as me I don't see a point of having them.

But now I have a bunch of outsider IDs, but I see no use for them. Unlike older versions outsiders IDs did something.
[b]Is there a feature in Pokemon X and Y that uses outsider IDs or anything related?[/b]

If you are confused I am talking about this:
In Gold, Silver, Crystal, HeartGold and SoulSilver has Pokemon Lottery Corner in the Goldenrod Radio Tower and it gives you rewards for matching numbers.
In Ruby, Sapphire, and Emerald has Pokemon Lottery Corner in Lilycove Department Store and it gives you rewards for matching numbers.
In Diamond, Pearl, and Platinum has Pokemon Lottery Corner in Jubilife TV building and it gives you rewards for matching numbers.
[b]So the more IDs you have the more chance you have winning the Lottery.[/b]

In Black 1 and White 1 has a man in Castelia City Pokemon Center that gives [b]rewards for having different outsider IDs.[/b]

In Black 2 and White 2 we got Raffle Shop that [b]didn't need outsiders IDs[/b] but still got rewards for just talking to the guy.

In X and Y I haven't seen this feature. I know Pokemiles go up every time we make a trade but this still works when we trade a Pokemon that we just got too!