Kalos Mythical Trio: Diancie, Hoopa, Volcanion

The last three Pokemon in the Kalos Pokedex are the Mythical Pokemon of the region: Diancie, Hoopa, and Volcanion. All three Pokemon possess great power, and all three have a story to their name.

Diancie is one of the few Mythical Pokemon that can mega Evolve, if not the only one. It's associated closely to Carbink, being a relative of the Pokemon Breed. It's a slow defesnive Pokemon in its regular form, but a fast mixed sweeper after Mega Evolving. And it has been linked to beginning of Mega Evolution, along with Mega Rayquaza.

Hoopa also has the ability to another form, called Hoopa Unbound. Hoopa loves to cause mischief, especially in its more powerful Unbound Form. In said form, it has the power to transport even Legendary Pokemon through its hoop to the same location, and we all know that Legendary Pokemon don't really care for each other. Let's put it like this: Unbound Hoopa is so strong, it was bound to a prison bottle and only Arceus had enough strength to defeat it. Both forms of Hoopa are used as Mixed Sweepers.

Volcanion is the last of this Mythical bunch, and it's a pretty mysterious Pokemon. It hates people for a number of reasons, and it has the power to do something about it. It's a slow, bulky tank of Pokemon that has extremely high Attack and, even better, Special Attack. It is the only Fire/Water Type Pokemon known to man.

#719 (Diancie), #720 (Hoopa) & #721 (Volcanion): All three are only obtainable by Pokemon Events, as they are all Mythical Pokemon.