Power Construct (ability)
Power Construct is unique to Zygarde. When Zygarde 10% Forme or Zygarde 50% Forme falls below half HP, it changes into Zygarde Complete Forme.
As Complete Forme has a higher base HP than the other two Formes, its HP is also restored by the same amount the maximum HP increased.
Ultra Sun/Ultra Moon
|Other Cells gather to aid when its HP becomes half or less. Then the Pokémon changes its form to Complete Forme.|