In 2013, "Pokémon X & Y" were released. They are the first ever 3D games in the main "Pokémon" series. They take place in a new region called Kalos. There are many new features, including the Mega Evolution, where some Pokémon like Mewtwo, Blaziken, and Lucario are be able to evolve into stronger forms during a battle if they are holding a Mega Stone. There is also a new type called Fairy, which is strong against Dragon-type Pokémon.