Pokémon: Mega Evolution

Mega Evolution. A new evolutionary form introduced in the Kalos Region. Is it really possible for all Pokémon to undergo Mega Evolution? This story revolves around a young trainer named Alan and his partner Lizadon (Charizard). Alan's objective on his journey is to "defeat all Mega Evolution Pokémon and stand at the top of the strongest summit." Along their journey Alan and Charizard meet and battle with Mega Absol and Mega Gaburias (Mega Garchomp). Additionally, Alan will battle with Zumi (Siebold), one of the Kalos Elite Four. Does Siebold also have a Mega Evolution Pokémon? Why is Alan so obsessed with Mega Evolution? And what is the real purpose of his journey?