It's recently been revealed that Charizard will have an alternate Mega Evolution exclusive to Pokemon X. Here's footage of this new form in action. Take a look.

This new evolution is a Fire/Dragon-type Pokemon, thus finally making Charizard an actual dragon. The new form also has a stronger attack stat, as well as a new ability called Tough Claws that increases the power of physical contact.

That's all the news there is for now. I'll keep my eyes out for more. So stay tuned.