I know how to chain Pokemon in platium. I was just wondering if there was a difference in x and y.
The Poké Radar makes a return in Pokémon X and Y, functioning much the same as in Diamond, Pearl, and Platinum. It is received by the player once he or she has defeated the Elite Four, by talking to the scientist on the second floor of Professor Sycamore's Lab. It can not be used in the Friend Safari or while using the Roller skates.
So basically no differences in chaining.
Source