Pokemon XY: Koukoku no Princess Diancie
English name: Diancie, Princess of the Diamond Domain
Genres: Comedy, Fantasy
Type: Special, Episodes: 1
Aired: Jul 17, 2014
Studio: OLM
Source: Game
Rating: PG - Children
Synopsis:
In order to save the Diamond Ore Kingdom from certain danger Princess Diancie and the Carbink who serve as her butlers set off together on a journey to find the legendary Pokémon Xerneas. But who is that waiting for them on the road ahead...!? 

(Source: Pokémon Wiki)