Every Pokemon game features NPCs that you can trade with in order to obtain different Pokemon, and Pokemon X and Y are no different.
I usually try and find and trade with all the NPC traders throughout a game. However so far I've only found one in Santalune City (he wants a Bunnelby for a Farfetch'd named Quacklin' – the best name ever, IMHO).
So where are all the other NPC traders? What Pokemon do they want, and what do they offer in exchange?
Best Answer
So far that I've found, the in-game trades are as follows:
After Elite Four