On Friday, October 14th, 2016, the official Japanese Pocket Monsters Sun and Moon website updated with information about the series.

Story

Satoshi and Pikachu's new adventure begins!

The place that acts as the setting of their new adventure is the Alola Region, which is bustling with nature.
What lies in wait for Satoshi and Pikachu in the Alola Region,
where you are surrounded by the blue sky and the blue sea wherever you go...?

New Pokémon, new friends, and new adventures...
This adventure filled with all kinds of new things finally begins!

Let's go! Let's give it our all! It's an adventure!!

Characters

Characters
	Satoshi & Pikachu Satoshi: A 10 year old young boy that aims to become a Pokémon Master. He's experiencing school life for the first time in the Alola Region! Pikachu: Satoshi's first partner Pokémon and his greatest companion.
	The Rotom Zukan Leave everything Pokémon knowledge-related to it. This is a groundbreaking Pokémon Zukan which finishing touch was having a Rotom enter it. It speaks human language and assists Satoshi on his adventure.
	Lilie A girl that loves Pokémon, but is unable to touch them for some reason. Her knowledge of Pokémon is top notch.
	Kaki He likes Fire type Pokémon. His family runs a farm, so he helps out there while also attending school.
	Mao She likes Grass type Pokémon. She's an active girl who's also a bit of a scatterbrain. She helps out at the Aina Cafeteria her family runs by attracting customers to come in and eat.
	Suiren She likes Water type Pokémon. While she's usually quiet, she's actually a girl of action. She's the oldest of the three daughters of a fisherman.
	Māmane He likes Electric type Pokémon. A science nerd with a vast knowledge of technology. When he gets into something, he analyzes the subject very thoroughly.
	Professor Kukui A professor that studies Pokémon battling and moves. He is also the class' homeroom teacher. Satoshi lives at his house during his stay.
	Principal Okido The school's principal. The cousin of Professor Okido from the earlier series. He researches Pokémon that evolve in unique ways in Alola.
	The Rocket Gang Musashi, Kojiro, Nyarth and Sonansu An evil organization which goal is to get rare Pokémon, strong Pokémon, as well as Satoshi's Pikachu.

The New Pokémon

New Pokémon
	Ashimari Sea Lion Pokémon Water type
	Mokuroh Grass Quill Pokémon Grass/Flying type
	Nyabby Fire Cat Pokémon Fire type
	Iwanko Puppy Pokémon Rock type
	Togedemaru Roly-Poly Pokémon Electric/Steel type
	Mimikkyu Disguise Pokémon Ghost/Fairy type
	Kiteruguma Strong Arm Pokémon Normal/Fighting type
	Nassy (Alola Form) Coconut Pokémon Grass/Dragon type
	Kapu-Kokeko Land Spirit Pokémon Electric/Fairy type

Staff:

Executive director: Kunihiko Yuyama
Director: Daiki Tomiyasu
Series Construction: Aya Matsui
Character Design: Satoshi Nakano and Shuhei Yasuda
Art Director: Masatoshi Muto
Color Keys: Noriyuki Yoshino
Director of Photography: Yuko Orikasa
Editor: Jin Nogawa
Music: Shinji Miyazaki
Sound Recording Director: Masafumi Mima

Cast:

Satoshi: Rica Matsumoto
Pikachu: Ikue Ohtani
Rotom Zukan: Daisuke Namikawa
Lilie: Kei Shindo
Kaki: Kaito Ishikawa
Mao: Reina Ueda
Suiren: Hitomi Kikuchi
Māmane: Fumiko Takekuma
Professor Kukui: Keiichi Nakagawa
Principal Okido: Unsho Ishizuka

Musashi: Megumi Hayashibara
Kojiro: Shinichiro Miki
Nyarth: Inuko Inuyama
Sonansu: Yuji Ueda

Source: http://www.tv-tokyo.co.jp/anime/pokemon_sunmoon/