When we talk about the Pokemon game series, the Shiny Pokemon might be one of thing that Pokemon trainers would want so badly. It was rumored that on the Pokemon X and Y, the encounter rate for the Shiny Pokemon had been adjusted and it is easier to encounter a Shiny Pokemon now.
An easy way to encounter a Shiny Pokemon is by tipping NPCs. You can tip them $100, $500 or $1000. This was confirmed by Geek who came across a Shiny Oddish after tipping a photographer that was hanging around outside the Parfum Palace. However, the gamer had not meet any Shiny Pokemon after that.
Do you know it is possible to get a Shiny Pokemon through breeding? All you have to do is use the parents that was caught from two different regions. The egg from these two Pokemons has a high possibility to hatch into a Shiny Pokemon. Pokeradar had been brought back to the Pokemon X and Y. You will be able to get this tool after you had beaten the Elite four from Professor Sycamores lab. If you used the Pokeradar correctly, you would be able to detect a Shiny Pokemon using it.
However, it would still take a lot of effort to get a Shiny Pokemon no matter which option you try. You still have to be patient and keep trying these three options and not expect you will get a Shiny Pokemon on one try. So, what are you waiting for? Good luck in getting your Shiny Pokemon!