I just wanted to tell people my method for quick egg hatching. I've seen a lot of people saying they take so long to hatch eggs.
I have a Fletchinder in my main slot, since it has Flame Body, AND can learn fly. I used to have a Larvesta, and a Pidgeotto, but when I learned Fletchinder had Flame Body, that gave me one more egg slot.
Fill up with 5 eggs, then Fly to the middle Lumiose City location. You will fly right to the Centrico Plaza, which is just a huge circle. There, you can ride your bike in an infinite loop, just by holding down left or right. Then when all your eggs hatch, just fly back to Camphrier Town.
If this is already widely known, then cool. But I just figured people should know Centrico Plaza was practically designed for egg hatching.