Well... yeah. Caught Zygarde a while ago and apparently it only appears and unveils its secret power when the ecosystem falls into disarray. And it's the "third legendary" of Xerneas and Yveltal, so...
Box by jevangod, most artwork and screenies are official, Calem/Serena models pictures from Bulbapedia. Design by me, obviously.
Pokémon Z Box Cover Comments
Comment on Jankip's Pokémon Z Box Art / Cover.