Sep 12, 2015, 09:47 AM
Forgive me if this has already been said, but I think Zygarde will switch between forms while in battle. When it's health is 100% it will be in it's perfect form, when it hits 50% health, it switches to the "normal" one, and when it's health is in the red, it switches to it's 10% form. Each form has different base stats, with the first one having high attack power, it's middle form will be more defensive, and it's last form with have high speed. Just a speculation of mine.