The Legendary Zygarde is made its debut to Pokémon Go during the Blaze New Trails event, and players were able to encounter one via Special Research story From A to Zygarde. But the grind doesn’t stop once you’ve done the Special Research and caught your Zygarde, with plenty more to come after.
It all comes down to this Legendary Pokémon from the Gen VI entry of this series has three different possible forms it can swap between with the help of Zygarde Cells. Zygarde has a 10 percent Forme, which resembles a dog and is the frailest of the three, though it has the highest Attack stat. The 50 percent Forme looks like a snake and gives up some of its Attack for more bulk. And finally, the Complete Forme has a massive health stat to make it even bulkier. When you catch Zygarde, it should be in its 10 percent Forme during the Special Research encounter, but you need Zygarde Cells to evolve it further.