Pokemon X and Y has Mega Evolved, adds in-battle evolution starting with Mega Mewtwo, Mega Lucario - Neoseeker

Also, so much more than just Mega Evolution

Here's Every Mega Evolution That Will Eventually Be Added to

Mega-Evolved Pokemon - Pokemon X and Y Guide - IGN

Pokemon X and Y has Mega Evolved, adds in-battle evolution

I draw way too much — Newt reminisces on her first mega evolution

Mega X Shadow Mewtwo and Mega Lucario by JYUSKO on DeviantArt

Pokemon Black & White Official Game Guide, PDF, Pokémon

Mega-Evolved Pokemon - Pokemon X and Y Guide - IGN

New Pokémon X &Y trailer reveals starter evolutions and new Mega

Pokémon X & Y - Mega Evolutions

Pokémon X and Pokémon Y: Mega-Evolved Pokémon Revealed!

Analyzing The New Mega Pokémon - Game Informer

Project - Ubers Player of the Week · [Week #2: Transcendent God

What is a good in-game team for X and Y? (page 4) - PokéBase