Progress through the main story until you unlock access to Zygarde-related content
Complete the required story missions tied to Zygarde
Reach the point where Zygarde becomes available as a special encounter or reward
Follow the in-game quest steps to locate Zygarde
Battle and capture Zygarde when the encounter becomes available
If the game uses Zygarde Cells or cores, collect the required pieces first
Return to the designated NPC or location to assemble or receive Zygarde
Check postgame or side missions if Zygarde is locked behind them