Zygarde, Xerneas and Yveltal in the base game; Darkrai, Rayquaza, Groudon, Kyogre and about ten others in the Mega Dimension expansion; Diancie and Mewtwo through Mystery Gift. Here is where to find every legendary and mythical Pokémon, at what level, and what you need to do to unlock it.

In the base game

No. 84 · mission 42

Zygarde

Your guide throughout the story. After Xerneas and Yveltal, defeat L, then face Zygarde at the foot of Prism Tower (Wild Zone 20): a battle in three forms (10%, 50%, Complete). The Zygardite, obtained in mission 37, lets it Mega Evolve.

The strategy →
Mega Evolution

Mega Zygarde

Exclusive to the Complete Forme, it turns Core Enforcer into a devastating attack. One of the story’s big surprises.

  • XerneasNo. 75Fairy

    Mission 40, “The One Who Gives”. Defeat the three anomalous Alphas in Wild Zones 3, 5 and 9 (Steelix, Gallade, Pangoro), then look for it on the north side of Wild Zone 11. Fairy: it fears Poison and Steel.

  • YveltalNo. 75DarkFlying

    Mission 41, “The One Who Takes”. Win three Rogue Mega simulations at Quasartico Inc., then climb onto the roof of the Moonlight Gallery in Rouge Sector. Dark and Flying: it fears Ice, Electric, Rock and Fairy.

Through Mystery Gift

  • DiancieNo. 70RockFairy

    Pick up the Diancite through Mystery Gift, then head to the Beladonis Agency. The agency's Espurr reacts to the stone: follow it to a rooftop covered in Mega crystals, in Magenta Sector 8. Diancie appears there with two Carbink.

  • MewtwoNo. 70Psychic

    Pick up Mewtwonite X and Mewtwonite Y through Mystery Gift, then go down to basement level 3 of the Lysandre Labs: the laboratory starts up again and Mable asks you to catch Mewtwo, a former Team Flare project.

In the Mega Dimension expansion

The first five are obtained by following the extradimensional missions (see the expansion walkthrough).

  • HeatranNo. 80FireSteel

    Extradimensional Mission 9, after its Rogue Mega battle in the Blazing Inferno. With the Heatranite.

  • DarkraiNo. 85Dark

    Extradimensional Mission 11, in the Newmoon Island Nightmare, after two phases of battle. With the Darkranite.

  • GroudonNo. 80Ground

    Extradimensional Mission 13: prepare the Old-Fashioned Omega to open the ruby rift. With the Red Orb.

  • KyogreNo. 80Water

    Extradimensional Mission 14: prepare the Old-Fashioned Alpha to open the sapphire rift. With the Blue Orb.

  • RayquazaNo. 85DragonFlying

    Extradimensional Mission 12: prepare the Old-Fashioned Delta, then enter the emerald rift above Hotel Z.

After the end of the expansion

Once Rayquaza is caught, new side missions unlock a whole bunch of mythical and legendary Pokémon:

  • HoopaNo. 80PsychicGhost

    Urbain/Taunie finds a Prison Bottle in AZ's room. A rift opens: fight Hoopa Unbound, then catch it.

  • MagearnaNo. 80SteelFairy

    Jett asks you for 999 Mega Shards to craft a Magearnite: it awakens Magearna, who joins you with its stone.

  • ZeraoraNo. 85Electric

    Trade a Narica bread for a sparkling treat with a boy on a rooftop in Vert Sector 3, then prepare the Plasma Donut with Anya. A rift opens in front of the station: defeat Mega Zeraora.

  • VolcanionNo. 80FireWater

    Mable has found a Poké Ball hacked by Team Flare: it contains an enraged Volcanion, to be calmed in battle at the Pokémon Lab.

  • MeltanNo. 70Steel

    A side mission in Rouge Sector 1 puts you on Meltan's trail.

  • MelmetalNo. 80Steel

    After Meltan, a rift leads to a little girl surrounded by Meltan, who gives you a Melmetal.

  • GenesectNo. 60BugSteel

    The man who trades TMs for Mega Shards (Vert Sector 7) sells the four Genesect Drives (540 shards each). Buy them all, then examine the indicated wall in Wild Zone 13.

  • MarshadowNo. 80FightingGhost

    A rumor tells of a ghost child: go to the training ground in Rouge Sector 1 when the shadow of Prism Tower crosses the Poké Ball drawn on the ground.

Extra Research

After side mission 188, Gypso can launch an Extra Research for 25,000 extradimensional research points: a special 5★ rift appears. Some of them house a legendary or mythical Pokémon, at level 60. After five Extra Research runs without a legendary, the next one is guaranteed to contain one, until you have them all.