History Characters / PokemonAuraTrio

Zygarde is the third Legendary Pokémon that resembles a green and black serpent with hexagon patterns, said to bring order between Xerneas and Yveltal. Zygarde, much like Rayquaza, Giratina, and Kyurem, has multiple formes. Each forme is made up of a combination of Zygarde Cells and its "brain", Zygarde Cores. While it usually remains in its serpent-like 50% Forme, in emergencies, it can send out a single Core as its 10% Forme, which resembles a dog, and in grave situations, it can combine with other Cells and Cores to attain its Complete Forme, which is the most humanoid, but is also gigantic and otherworldly.

[[BreakingOldTrends In a break with series traditions]], Zygarde's formes did not debut in a third version or sequel set in the Kalos region, but rather as part of ''VideoGame/PokemonSunAndMoon''. This, combined with the semi-replacement of Aura Break (a PowerNullifier against Xerneas and Yveltal's Abilities) with Power Construct, seems to suggest that Zygarde has been interpreted as more than just a mediator between Xerneas and Yveltal. Zygarde is, in an odd twist of tradition, set to play a prominent role in the upcoming Legends game, ''VideoGame/PokemonLegendsZA'', a little over a decade after its debut.

* AdaptationExpansion: In lieu of another Kalos game, Zygarde and its different formes got much more focus and explanation in the ''[=XY&Z=]'' season of the anime.

* BizarreAlienBiology: The way Zygarde's formes work is incredibly unusual and complex, even by Pokémon's standards:

** The other formes (10%, 50%, and Complete) come about depending on how many Cores and Cells make up the whole. The more of them are assembled, the larger and stronger the forme.

** To get a Zygarde with the Power Construct ability, and by extension Complete Forme, you have to scour every inch of Alola for all 100 Zygarde Cells and Cores. Given that some of them can only be found in the post-game, you are very much ''earning'' it. That said, one ''can'' use ''Pokémon Bank'' to transfer a Zygarde from ''VideoGame/PokemonXAndY'' over and use that for an extra 50 Cells to get the forme early.

* GodzillaThreshold: Zygarde ''never'' resorts to using its Complete Forme unless it has no other choice and the familiar form we all know and love has no chance of handling the problem. This even shows in gameplay -- where, rather than being a forme it can change into outside of battle, its alternate ability, [[SuperMode Power Construct]], [[LimitBreak lets it morph into its Complete Forme]] [[TurnsRed when it reaches critical health]].

* StoneWall: Zygarde's Complete Forme, for [[OlympusMons Legendary standards]], having a massive HP stat as well as good (but not spectacular) defenses, but comparatively low Attack, Special Attack, and Speed. Notably, unlike Zen Mode Darmanitan - another 'mon with a Forme change ability that triggers upon reaching low health - Complete Zygarde does '''not''' revert to its normal Forme until the end of the battle, even if its health goes back above 50%. This makes it a fantastic Rest user, capable of leveraging the full extent of its massive health pool

* TransformationSequence: If it has its hidden ability Power Construct, Zygarde gets one of these when it reaches half HP and turns into its Complete forme.