How do I get Zygarde?

So far in my playthrough I've heard there is a way to obtain Zygarde but I have never encountered a Zygarde in the wild nor has the game really showed me how to get Zygarde.

If there is a way to get the legendary Pokemon Zygarde, what is it, and how do I do so?

pokemon-sun-moon

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How do you get 100% Zygarde in PokÃ©mon sun?

Zygarde is one of the legendary Pokemon you can acquire in Sun and Moon. However, you can't just catch it with Poke Balls. Instead, you have to travel all around the Alola region, picking up Zygarde Cells and Cores in order to assemble the creature.

Can you catch Zygarde in PokÃ©mon sun?

Zygarde is one of the Legendary Pokemon you can catch in Pokemon X and Y. Defeat the Elite Four.

What game can you get Zygarde?

Legendary Pokemon Shiny Zygarde will be made available for Pokemon Sun and Moon, and Ultra Sun and Moon players on June 1. Zygarde is a Dragon/Ground-type with three distinct forms from the Kalos and Alola regions.

Legendary Zygarde Encounter (How to Catch) - Pokemon X and Y

Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.

Images: Tatiana Syrikova, Ketut Subiyanto, Robert Nagy, Yan Krukov