This manga is based on the 15th full-length Pokémon movie.

Keldeo is determined to become a Sword of Justice, but to do so, Keldeo must defeat Kyurem, one of the most powerful Dragon-type Pokémon in the world. Keldeo challenges Kyurem, unleashing a destructive force even Ash and Pikachu may be powerless to stop!

(Source: Amazon)