How do you catch Zapdos in Pokemon X?

Question

I was surfing on route 22, on my way to Chamber of Emptiness (I was wearing repel) and then Zapdos appeared! Before I could do anything it fled! How am I going to catch it if it leaves right before I can you a quick or master ball! Please help me! Thank you! :)

Answer 1

After defeating the Elite Four, several Pokémon start to roam the region, Articuno, Zapdos and Moltres. However, you will only get one: Articuno if you picked Chespin, Zapdos if you picked Fennekin and Moltres if you picked Froakie. However, a change has taken place compared to previous games. These Pokémon will automatically flee from combat, before you even get a chance to select a move. You can track their location with the Pokédex. After they have run from you over a dozen times, they will go to the Sea Spirit's Den where you can finally battle them

Source: Serebii