How to unlock Zygarde
There is no direct purchase for Zygarde. It appears on the Kalos banner inside the 5★ pool. The 5★ band takes 1.5% of all pulls and holds 103 partners, so one specific Zygarde works out to about 0.0146% per draw. The 70-pull pity counter guarantees a 5★, but it does not target Zygarde specifically, so a guarantee can still resolve to another 5★. A duplicate Zygarde refunds 300 coins at the 5★ rate.
Zygarde stats and rank
The sheet lists Zygarde at 119 HP, 118 speed, ×1.25 attack, ×1.25 physical and ×1.15 special, with 121 defense and 95 special defense — 600 base-stat total. On the three-stat percentile this is 79.0 out of 100, which puts Zygarde at rank 83 of 966 and in tier A. Relative standing explains more than the total here: its strongest slot is defense (94th percentile) and its weakest is attack multiplier (63rd percentile), so it is a specialist rather than an all-rounder.
Best moves in Zygarde's pool
At move level 5 the pool is led by Dragon Claw at 48.3 damage per 0.39s (154.8 effective DPS, ×1.25 multiplier), then Body Slam at 75.6 damage per 0.71s (132.6 effective DPS, ×1.25 multiplier), then Tackle at 33.6 damage per 0.38s (112.0 effective DPS, ×1.25 multiplier). 12 of its 17 damaging moves scale with the physical multiplier and 5 with the special one, alongside 5 support moves. Its physical multiplier is the higher of the two (×1.25 against ×1.15), so physical moves convert better. The top option beats the second by 22.2 DPS, which decides slot one and leaves slot two as a judgement call.
Evolution cards for Zygarde
Its starting move, Dragon Rage, evolves into Draco Meteor once the move is at level 5 and you hold the Power card, which boosts attack for that run. A level 5 move without Power in the run is still just a level 5 move. 17 of its 22 moves carry an evolution card, across 5 distinct cards (Vigor, Sprint, Power, Reflexes and Armor). The strongest of them is Dragon Claw at 154.8 effective DPS, so that is the one worth holding a card for first.
Zygarde compared to similar partners
The two closest stat lines in the roster are Giratina (+19 HP, -2 speed, same attack multiplier, +80 total) and Mew (-4 HP, +2 speed, same attack multiplier, +0 total). Against Giratina, Zygarde is 2 speed faster and the two carry an identical ×1.25 attack multiplier, and the rank gap is 1 places. The exchange rate is the point: nothing here improves on both lines at once, so neither side is a strict upgrade and the move pools have to break the tie.