Pokemon fan site Serebii is reporting that the Pokémon Company is planning to release a Pokémon Sun & Moon manga via CoroCoro Comics on 15th September. The story is based around a tale of a new Trainer and his partner Rockruff exploring the various locations in the Alola region. Details are due to be released in CoroCoro Magazine this week.
9月15日(木)よりコロコロコミックで、『ポケットモンスター サン・ムーン』の世界を舞台にした新マンガがスタート! 詳しくは8月12日(金)発売号をチェック! #ポケモン_サン・ムーン pic.twitter.com/YIt0Dl7EYK
— ポケモン公式ツイッター (@Pokemon_cojp) August 8, 2016

Interesting that they didn’t go with one of the main characters of the game this time round.
The manga will most likely follow characters named Sun & Moon, like previous mangas have done with Red, Blue, Green, Yellow, Gold, Silver, Crystal, so on & so forth. So this will probably be no exception.
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And watch it be miles better than the anime.
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