Hi, newfag here.

I just got into Pokemon X recently (my first pokemon game) and I ran into Zygarde in the cave, but being an idiot I did not know that it was wise to save before battling him. So I accidentally beat him before catching him and then saved afterwards thinking I could just go back into the cave and face him again...

Do we only get one shot at him? is there anyway to bring him back in order to catch him?