First off is Dartrix, the evolved form of Rowlet:
Apparently Dartrix is a bit of a prude, as the game's official website's description of it says, "Revealing a certain snobbiness in its personality, Dartrix cares a great deal about its appearance, grooming its feathers in every spare moment...At times, this Pokémon feels so bothered by its dirty or ruffled feathers that it can’t focus on battle. When it loses its focus, it sometimes even retires from the battle on the spot! It’s up to each Trainer to help Dartrix overcome this troublesome stage."
Next up we have Torracat:
Torracat retains its previous form's typing and, from the sound of things, gains a lot of firepower (pun intended). "The cat punch that this Pokémon can dish out with its strong forelegs is extremely powerful. It can bend iron bars and knock out large men with a single blow!"
And finally we have Brionne.
Like Torracat, Brionne's type remains the same as its predecessor. However it appears that Brionne dropped acrobatics in favor of dancing, as it "can dance in perfect time with others, even if they have only just met. On moonlit nights, you can sometimes see throngs of Brionne dancing as one, in perfect fluidity."
But that's not all the news we got from the trailer. Sun and Moon will also feature a location called the "Festival Plaza", a place where players can interact with representations of other players' characters and earn coins which can then be spent on items, possibly similar to Join Avenue from Pokemon Black 2 and White 2. In addition to Festival Plaza, Sun and Moon will introduce a feature called Poke Pelago, an area where the Pokemon that players deposit in their PC storage boxes can go to. Pokemon there can recruit other Pokemon for you, search for items, or consume stat-boosting drinks.
Additionally, the trailer confirms that mega-evolution will be returning and that the Z-ring previously mentioned in the trailers will also function as the catalyst for mega-evolving Pokemon.
And finally, a special demo of Pokemon Sun and Moon versions will be available via the Nintendo eShop starting October 18, and players who participate in the demo will be able to obtain a special Greninja that can later be transferred to the full game. This special Greninja is none other than the Ash-Greninja from the anime, which has a special ability called "Battle Bond" that will allow the Greninja to change its form just like the one Ash owns in the anime.