Pokémon X & Y - Legendary Pokémon

Legendary Pokémon

Like the other games, there are numerous Legendary Pokémon to be found within the Kalos region. These Pokémon are the most powerful ones around and are very difficult to capture

Stationary Pokémon

#716 Xerneas & #717 Yveltal

Location: Team Flare HQ

Method:
Xerneas and Yveltal are found in Pokémon X & Y respectively as you play through the game's narrative. In it, they are being used by Team Flare in order to try and wipe out the world to make it begin again beautifully. However, you will be able to stop them and when you do so, you automatically battle Xerneas/Yveltal.

Xerneas

Level 50

OT:	Yours
ID:	Yours
Ability:	Fairy Aura
Hold Item:
None

??? Nature.
Date of Receiving
Team Flare's HQ. Caught at Lv. 50

Yveltal

Level 50

OT:	Yours
ID:	Yours
Ability:	Dark Aura
Hold Item:
None

??? Nature.
Date of Receiving
Team Flare's HQ. Caught at Lv. 50

#718 Zygarde

Location: Terminus Cave

Method:
After defeating the Elite Four, you can go deeper through Terminus Cave until you find the final basement. In this basement, you will find a Pokémon in its slumber. Interact with it and it will attack. It is a Dragon/Ground-type so plan accordingly.

Zygarde

Level 70

OT:	Yours
ID:	Yours
Ability:	Aura Break
Hold Item:
None

??? Nature.
Date of Receiving
Terminus Cave. Caught at Lv. 70

#150 Mewtwo

Location: Pokémon Village

Method:
After defeating the Elite Four, a man will stop blocking a cave within the Pokémon Village. In this cave, you will find nothing but a solitary Mewtwo with its back against the door. Interact with it and a cutscene will occur where it notices you and attacks. After defeating it, you will receive the Mewtwonite item depending on your version.

Mewtwo

Level 70

OT:	Yours
ID:	Yours
Ability:	Pressure
Hold Item:
None

??? Nature.
Date of Receiving
Unknown Dungeon. Caught at Lv. 70

Roaming Pokémon

#144 Articuno, #145 Zapdos, #146 Moltres

Location: Grass & Water of Kalos; Sea Spirit's Den

Method:
After defeating the Elite Four, several Pokémon start to roam the region, Articuno, Zapdos and Moltres. However, you will only get one: Articuno if you picked Chespin, Zapdos if you picked Fennekin and Moltres if you picked Froakie. However, a change has taken place compared to previous games. These Pokémon will automatically flee from combat, before you even get a chance to select a move. You can track their location with the Pokédex. After they have run from you over a dozen times, they will go to the Sea Spirit's Den where you can finally battle them

Articuno