From Bulbapedia, the community-driven Pokémon encyclopedia.
Pokémon TV Animation Comic - I Choose You! is a comic book published as a collaboration between VIZ Media and Nintendo Power. It is a bound collection of all of the "Pokémon Power" Ani-Manga comics that appeared in Nintendo Power magazine, which in turn are translations of the Pocket Monsters Film Comics created in Japan.
Pokémon TV Animation Comic - I Choose You! contains adaptations of Pokémon - I Choose You! through Clefairy and the Moon Stone, as well as character biographies and Pokédex entries for some of the Pokémon that appeared in those stories.