Koukoku no Princess Diancie

鉱国のプリンセス ディアンシー

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)