You've rolled credits in Legends Z-A and your wish at Hotel Z just reshaped Lumiose's nightlife. Now what? If your goal is the complete trio—Xerneas, Yveltal, and Zygarde—this walkthrough turns post-game chaos into a clean, repeatable route. I'll show you why the Infinite ZA Royale matters, where the anomalies spawn, how the boss patterns actually work, and when to press capture versus when to just stay alive. If you've ever wondered Do I need to prep a sweeper or a tank? or Is this shiny-locked?, you'll get straight answers plus practical setups I've tested.

• Unlock the playground: Infinite ZA Royale
• Mission 40: The One That Gives (Xerneas arc)
• Mission 41: The One That Takes (Yveltal arc)
• The L checkpoint: A real fight before the real fight
• Mission 42: To Keep the World in Balance (Zygarde 10% → 50% → 100%)
• Helpful roster and item notes
• Known flags and expectations
• FAQ
• Conclusion

↖ Unlock the playground: Infinite ZA Royale

- What to do

  - After credits and your wish at Hotel Z, Infinite ZA Royale unlocks. There are now three battle zones per night instead of one.

  - Farm to 50,000 points to trigger a Challenger Battle; your first challenger is the (deceptively weak) early-game cab driver archetype.

- Why it matters

  - Hitting 50,000 points flags the game to push you into the legendary arc (calls to return to Hotel Z). Think of it as the mission flag, not an end in itself.

- Practical tips

  - Don't overthink the early challenger's low levels; take the items (Carbos, Exp. Candies) and move on.

  - If you're time-poor, focus on fast clears rather than perfect teams—points, not prestige, gate the next step.

↖ Mission 40: The One That Gives (Xerneas arc)

- Trigger

  - Head back to Hotel Z when prompted; L briefs you on the life/death duo. Mission 40 starts.

- Anomalies to clear (catch or defeat)

  - Wild Zone 3: Alpha Steelix. Note: Steelix is unobtainable in base game without trading—catch it now for long-term utility.

  - Wild Zone 5: Gallade near the Bellsprout area. Less unique, but decent if you skipped Wild Area 20.

  - Wild Zone 9: Alpha Pangoro on the lower southwest rooftop. Pathing can glitch; if it wedges into scaffolding, you can abuse aggro reset cycles.

- Xerneas encounter (Wild Area 11)

  - Nature: Static encounter; shiny-locked. Save before you approach.

  - Catch data: With Ultra Balls at low HP, expect roughly 50–60% success per throw when statused or red-lined. If you freeze or burn, you can stabilize odds further; repeat balls won't exceed Ultra reliability here unless you've logged dex flags accordingly.

- Why this order

  - Clearing anomalies gates Xerneas; catching Steelix pays off for future fights (bulk and typing), turning a side chore into real roster value.

↖ Mission 41: The One That Takes (Yveltal arc)

- Trigger

  - Meet at the Quizardico building. You'll unlock solo rematches for Rogue Mega Pokemon as timed trials (levels scale up; level 70 seen).

- What to clear

  - Three specified rogue megas. They're time-scored but rewards are mostly bragging rights—don't grind for loot here.

- Yveltal encounter

  - Location: On top of the mall after the three clears.

  - Behavior: Moves creepily with wing-hands; expect aerial swipes and pressure.

  - Catch plan: Status first. A freeze led to ~75% Ultra Ball success in testing. Like Xerneas, this is a static post-game encounter—plan on non-shiny.

- Why it matters

  - Finishing both Xerneas and Yveltal sets the stage for Zygarde and grants you mission continuity with L.

↖ The L checkpoint: A real fight before the real fight

- Battle notes

  - L fields a cracked Mega Gyarados: high speed, flinch chance, and huge damage.

  - What to bring: Don't be shy about items. Intimidate pivots help. Electric- or Fairy-based answers can work, but ensure speed control (Thunder Wave, Icy Wind) or flinch mitigation.

- Why it matters

  - Beating L is the gateway to Zygarde's appearance and the Zygarde Cube handoff later.

↖ Mission 42: To Keep the World in Balance (Zygarde 10% → 50% → 100%)

- Pre-fight prep

  - If you've hoarded Exp. Candies, this is the moment. Pump a favorable counter. One tested setup: Feraligatr to 96 with Ice Fang + Breaking Swipe, plus Swords Dance and Agility for tempo. Stock Hyper/Max Potions and Max Revives.

- Phase A: Zygarde 10% (Pupper form)

  - Goal: Build your Mega meter and push damage. This phase is a warm-up; avoid overcommitting items.

- Phase B: Zygarde 50% (Slithery Snake)

  - Key patterns to learn

    - Land's Wrath: Green fissures appear behind you. Priority is your survival, not your mon's; drop commands and run/roll on cue. Recalling your Pokemon doesn't negate the player damage—movement does.

  - Strategy

    - Zygarde is not a Rogue Mega; plus-move rules don't apply. Keep pressure on with STAB Ice or Dragon checks, heal opportunistically, and maintain positioning awareness.

- Phase C: Zygarde 100% (Complete form)

  - Lethality: Can and will one-shot you if you eat the wrong pattern.

  - Ultimate patterns

    - Core Enforcer: Zygarde moves to the side, draws a giant green Z. Safe zones are the small black corners of the Z; you can roll through the damage with perfect timing, but parking in corners is safer while you chip. Recall your Pokemon before the beam if needed; reposition first, command second.

    - Land's Wrath (amped): Fissures are larger and converge inward. If you run center blindly, you'll die; roll diagonally through gaps.

    - Thousand Arrows: Annoying but less lethal—use it as your window to heal or reapply buffs.

  - Capture window

    - After knocking it out of the charge and wearing it down, Zygarde kneels. You can use any standard ball (no Origin Ball gimmick). If you like theme picks, Dusk/Luxury/Premier are all fair game.

- Post-capture mechanics

  - Zygarde Cube: Lives in Key Items. Use it to swap Zygarde between 10% and 50%.

  - Power construct behavior: Once Zygarde drops to ≤50% HP, it shifts to 100% Complete form and doubles its HP pool.

  - Mega timing: You already hold the mega stone (the pebble gift). You can only Mega Evolve after Zygarde enters 100% Complete form.

- Why this structure

  - Treating 10% as meter-builder, 50% as pattern class, and 100% as execution exam ensures you learn safely before the one-shot phase begins.

↖ Helpful roster and item notes

- Status beats brute force: Freeze, sleep, or burns on Xerneas/Yveltal noticeably improve catch odds and reduce time-to-cap.

- Team anchors to consider

  - Ice coverage is king for Zygarde. Physical breakers with Ice Fang/Icicle Crash perform well if you can keep them alive.

  - Bulky Intimidate users soften L's Gyarados and Zygarde's physical moves.

- Inventory checklist

  - 20–30 Ultra Balls, assorted status Balls if you prefer.

  - 10+ Hyper/Max Potions, 5–10 Max Revives.

  - Exp. Candies to push at least one counter to mid-90s if you're under-leveled.

↖ Known flags and expectations

- Static encounters are shiny-locked for Xerneas and Yveltal here; plan your Pokeball choice on aesthetics, not rarity rerolls.

- Time trials for rogue megas record PBs, but aren't tied to unique rewards in current builds—don't sweat perfection.

↖ FAQ

Q: Are Xerneas and Yveltal shiny-locked in this sequence?

A: Yes. These are static post-game encounters, so don't soft reset for shinies.

Q: What happens if I KO Xerneas or Yveltal?

A: The game strongly nudges capture, and NPC dialogue emphasizes catching. Save before engaging; if you accidentally KO, re-approach the trigger to reattempt. If your version doesn't immediately respawn, reload.

Q: Which ball should I use on Zygarde?

A: Any standard ball works. There's no Origin Ball equivalent. Dusk Ball is efficient at night/indoors; Luxury/Premier for style.

Q: When can Zygarde Mega Evolve?

A: Only after it's in 100% Complete form. You already have the mega stone via the story beat.

Q: Do I need to perfect the time trials?

A: No. Clearing the specified rogue megas advances the mission; PB is just a record.

Q: My Pangoro got stuck on scaffolding—what do I do?

A: Use the pathing bug to your advantage: back off to drop aggro, throw repeat/ultra balls on a timer, and apply a burn to tick it down safely.

Q: Recommended level to tackle Zygarde?

A: If you're struggling, push a key counter to ~95–96 with Exp. Candies. Survival and pattern knowledge trump raw DPS.

Q: Is there more post-game legendary content?

A: Event hooks exist for two EX missions (Diancie and Mewtwo analogs). Activation timing and steps aren't live yet; watch for updates.

↖ Conclusion

If you follow the chain—farm 50,000 points to flag the story, clear anomalies for Xerneas, replay rogue megas to draw out Yveltal, beat L, and then treat Zygarde as a three-phase pattern exam—you'll convert post-game chaos into a reliable legendary sweep. If you ever feel stuck, ask Which pattern is about to kill me? and reposition first; damage comes second. Do that, and the captures feel earned rather than lucky.