General

New Japanese Pokemon trailer of USUM:



Of note:

New video! Shows a bunch of stuff including the mysterious Ultra Recon Squad and another new Ultra Beast. You'll also be able to fly through Ultra Space Wormholes on Solgaleo/Lunala:


Japanese trailer with some differences:



New Pokemon Ultra Sun & Ultra Moon news has come including a new Ultra Beast, UB Adhesive which is a Poison type.


UB Burst is Fire/Ghost with a new move, Mind Blown.


UB Assembly is Rock/Steel.


There's also a new team called Ultra Recon Squad who dwell in an area in Ultra Space called Ultra Megalopolis. There are also various other areas to explore in Ultra Space.

Ultra Recon Squad's team members are Dulse, Zossie, Soliera, and Phyco with their appearances varying depending on the game: Dulse & Zossie in Ultra Sun and Soliera and Phyco in Ultra Moon.


Necrozma stole the light from their world and they appear to use UB Adhesive in battle.

All the Mega Stone codes for Sun and Moon are expiring at the end of the month, so you should enter them if you haven't already. All the codes are listed below and can be entered through the Mystery Gift option:

M2DESCENT
-(both Mewtwo X and Y)
INTIMIDATE
-(Beedrill, Mawile, Medicham, Audino)
AZUL
-(Pidgeot, Steelix, Heracross, Houndoom)
MATSUBUSA
-(Sceptile, Blaziken, Swampert, Camerupt, Banette)
SABLEVOLANT
-(Tyranitar, Aggron, Manectric, Abomasnow)
POYONG
-(Gardevoir, Lopunny, Gallade, Diancie)
DRACHE
-(Ampharos, Altaria, Latias, Latios)

Team Rainbow Rocket takes the stage! Encounter notorious bosses and Legendary Pokemon from the past, win your way through the Battle Agency, and more in Pokemon Ultra Sun and Pokemon Ultra Moon, coming November 17.

English trailer:


Japanese trailer with some altered content:


Team Rainbow Rocket is a new incarnation of Team Rocket, and is lead by Giovanni and all of the past villainous team leaders including Archie, Maxie, Cyrus, Ghetsis and Lysandre. They also appear to be using the legendary Pokemon they all coveted.

The previous video also revealed the Battle Agency, a new battle facility which is similar to the Battle Factory of the past. There are also Totem Stickers hidden throughout the games which will allow you to obtain some giant totem sized Pokemon, some of which are version exclusive (Lurantis for Ultra Sun, Salazzle for Ultra Moon).

More version exclusives have been revealed, primarily legendary Pokemon.

Exclusive to Ultra Sun
(returning from Sun)
Alolan Vulpix/Ninetales
Cranidos/Rampardos
Cottonee/Whimsicott
Tirtouga/Carracosta
Rufflet/Braviary
Turtonator
Passimian
Buzzwole
Kartana

(new)
Houndour/Houndoom
Lurantis (totem sized form)
Raikou
Ho-Oh
Latios
Groudon
Dialga
Heatran
Tornadus
Reshiram
Xerneas
Dusk Mane Necrozma
UB Burst


Exclusive to Ultra Moon
(returning from Moon)
Alolan Sandshrew/Sandslash
Shieldon/Bastiodon
Petilil/Lilligant
Archen/Archeops
Vullaby/Mandibuzz
Oranguru
Drampa
Pheromosa
Celesteela

(new)
Electrike/Manectric
Salazzle (totem sized form)
Entei
Lugia
Latias
Kyogre
Palkia
Regigigas
Thundurus
Zekrom
Yveltal
Dawn Wings Necrozma
UB Assembly


Also, similar to past games, some legendary Pokemon require legendaries from both versions to access:

Suicune (needs Raikou and Entei)
Rayquaza (needs Groudon and Kyogre)
Giratina (needs Dialga and Palkia)
Kyurem (needs Reshiram and Zekrom)
Landorus (needs Tornadus and Thundurus)

A lot of stuff got leaked over the past day or two. I won't spoil things for people except that there are at least 3 more new Pokemon that have yet to be officially revealed.

One last pre-release video showing that Move Tutors are back, and that Necrozma has some transformation gained via 'Ultra Boost'.

Ultra Sun and Ultra Moon are out. Don't forget you can get the special Rockruff, and you can also use Island Scan to get the Kanto starters on the first island amongst others too.

Special Rockruff:


-Melemele Island Scan


More info on how Island Scan works can be found here, though the Pokemon listed are for the original Sun/Moon:
reddit.com/r/pokemon/comments/5ex78s/everything_you_need_to_know_about_island_scan/

Oh, one word of warning, there's a really nasty fight late game involving a rather powerful Pokemon. You'll know what it is when you encounter it. Using a Mimikyu with Toxic or Curse bred onto it will cheese it if you can't beat it normally. Having other Pokemon spam Protect can help you survive until it falls.

Alternatively you can bring in Zorua/Zoroark and a Pokemon weak to Psychic and have it mimic that to bait the Pokemon's Psychic attack which Zorua/Zoroark is immune to.

bulbanews.bulbagarden.net/wiki/Hidden_Ability_Alola_Starter_Pok%C3%A9mon_available_to_redeem

Hidden ability Alola starters have been released to those using Pokebank.

Players can redeem fully-evolved Alola starter Pokemon with their respective Hidden Abilities via Pokemon Bank. Opening Pokemon Bank with either Pokemon Sun or Moon and/or Pokemon Ultra Sun or Ultra Moon sends them to the deliveryman at any Pokemon Center by Mystery Gift.



Long Reach turns all of Decidueye's contact-moves like Leaf Blade, Brave Bird, Shadow Sneak and Sucker Punch/etc into non-contact moves, so they won't trigger things like Iron Barbs, Rocky Helmet, Flame Body, Poison Point/etc.

Intimidate should be well known to people already (drops opponents attack by 1 stage when this Pokemon enters battle), and it helps Incineroar out immensely with its natural bulk and typing.

Liquid Voice turns Primarina's sound-based moves into Water moves, which turns Hyper Voice into a superior Surf/Sparkling Aria (doesn't cure enemies of burns like SA does, doesn't hurt allies, ignores Substitutes).