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Zygarde 50% Forme confirmed to have Swarm Change
Update: English names and further details on these Pokémon have been revealed. See the article English names of nine Sun and Moon Pokémon revealed for the updated information.
A new trailer for Pokémon Sun and Moon has been released, which features seven new Pokémon. This trailer has currently only been released in Japanese, so the names of new Pokémon are transliterations of their Japanese names (except Tapu Koko) and the names of the new moves and Abilities are translations of their Japanese names.
Tapu Koko is an Electric/Fairy-type Pokémon. It has the new Ability Electric Maker, which creates Electric Terrain. It can learn the new move Wrath of Nature, which is a damage-dealing move. Its English name was revealed in the E3 gameplay demonstration, in which it was described as Melemele Island's guardian deity (without appearing).
Denjimushi is a Bug/Electric-type Pokémon. It can learn the move Spark. It evolves into Kuwaganon.
Kuwaganon is a Bug/Electric-type Pokémon. It can learn the move Zap Cannon.
Jijīron is a Normal/Dragon-type Pokémon. It has the new Ability Frenzy, which raised its Special Attack after being hit by Dragon Claw (which lowered it to low HP). It can learn the move Dragon Breath.
Hagigishiri is a Water/Psychic-type Pokémon. It has the new Ability Vivid Body, which prevented an opposing Kangaskhan from using Fake Out on it. It can learn the move Psywave.
Aburī is a Bug/Fairy-type Pokémon. It can learn the move Fairy Wind.
Togedemaru is an Electric/Steel-type Pokémon. It has the Ability Lightning Rod. It can learn the move Discharge.
Additionally, Zygarde 50% Forme is now confirmed to have the Ability Swarm Change, which is the same Ability Zygarde 10% Forme was shown to have. Swarm Change allows Zygarde 10% Forme or 50% Forme to change into Complete Forme, and appears to activate when it is at low HP. Additionally, Zygarde 50% Forme is now confirmed to be able to learn Thousand Arrows, a move which exists unused in the code of the Generation VI games and that Zygarde 10% Forme has already been shown to use in Pokémon Sun and Moon.