Mega Charizard X is the second Mega Evolution of Charizard, introduced in Pokémon X & Y. It requires the Charizardite XMega Stone in order to Mega Evolve, which is exclusive to Pokémon X.

Changing its color scheme drastically, Mega Charizard X also changes its type to Fire/Dragon-type, allowing Charizard to finally become a Dragon-type Pokémon. Not only that, but it receives a major boost to its Attack stat along with the Tough Claws ability, which raises the power of any of its moves that make contact with the foe, such as Dragon Tail.

It was revealed internationally on October 2nd, first during the debut of Pokémon Origins in Japan, and shortly afterwards on the official Pokémon website.