I've done it, I have just beaten my pokemom X nuzlocke. I beat the elite four and the champion.

First I beat Malva, then I beat Siebold, then I beat Wikstrom and finally I beat Drasna, all where easy except from mabye Siebolds Gyarados but I still won and this is how I beat the champion Diantha.

First Noivern took out her Hawlucha with Fly in one hit, then Lucario mega evolved and took out Aurorus with Aura Sphere also in one hit, next Druddigon took out Goodra with Outrage but it failed to do the same against Tyrantrum who used Dragon Claw and Druddigon became my last casualty along with the last pokemon I caught in this nuzlocke. Lucario finished of Tyrantrum with Aura Sphere before Noivern missed taking out Gourgeist with Fly but took it out with Air Slash. Finally Diantha mega evolved her Gardevoir, I sent out Charizard who used Flare Blitz, it wasn't enough and Charizard took recoil damage along with Gardevoir using Thunderbolt to deal lots of damage to Charizard but he survived and finished of Gardevoir with a powerful Heatwave ending the battle with Diantha.

I also beat AZ in which Greninja took out all 3 of his pokemon.