Presently, it's been reported that users that mod their 3DSs (regardless Arm9LoaderHax or Boot9Strap) have been affected by a 002-0102 ban.

A ban of this error code is not new, with the most notable instance being when users went online with Pokemon Sun and Moon pre-launch.
Users with this ban are able to access e-Shop, but won't be able to access their Friends list, and also not able to connect online with games.
This ban is different from a simple Game-Sync/PGL ban; this ban affects and limits all games' online-play connectivity.

It is not known if this is an indiscriminate blanketed banwave against all Custom Firmware (CFW) users,
or whether there is a underlying mechanic responsible for this.

While we are unaware whether users with CFW already have their information captured by Nintendo's servers,
recommended actions are:

1. Don't attempt any online play. 
2. Keep your 3DS Network Switch "OFF"
3. Do not attempt to bypass the Ban (we don't know if it'll lead to more severe action)
4. Wait patiently for any findings (may take weeks)

External Source: http://gbatemp.net/threads/regarding-the-recent-3ds-banwave.471781/

Updated: For those that want to risk the pesky ban, these safeguards below could work.
[we are not responsible if it doesn't; this only applies to people who aren't banned.]

1. Streetpass MiiPlaza > Settings > Share Info => NO
2. Streetpass MiiPlaza > Settings > SpotPass => NO
3. Friend List > Settings > "Show friends what you're playing? => OFF
4. Friend List > [you] > Favorite > "Choose your favorite title" => "Don't have one"
5. System Settings > Internet Settings > SpotPass > Sending of System Information > NO
6. Uninstall Homebrew CIA and remove their tickets, including but not limited to, FBI, JKSM, Savedatafiler, any out of region games, etc.
7. To run other homebrew in a way that avoids illegal tickets, run them by injecting it into your Health&Safety. ^{(that's how my HBL is running now)}
8. Use Tiksweep to remove remaining unused tickets
9. Use GodMode9 to clear your Activity Log
10. Use Cthulu - Cache Tool to clear your shared icon cache and home menu icon cache
11. Launch and play every app (it'll be weird to have no activity in any of them)
12. Using your Router's URL filter to prevent 3DS from communicating with other servers unnecessarily

Various developers are still monitoring the situation, to identify the detection methods.

update2:
If you got time, take part in this survey:
https://goo.gl/forms/u1rTU5Txywg6N0V72

“Magikarp, the fish Pokémon. In the distant past, it was somewhat stronger than the horribly weak descendants that exist today.”

The Pokémon Company with developer SELECT BUTTON Inc. released Pokémon: Magikarp Jump on May 16^th exclusively in Apple’s Italian App Store. This means, if your Apple ID’s country is set to “Italy”, you can download this game right now.  Others will just have to wait until it is distributed elsewhere… Or, you could create an alternate Apple ID with the specified country and play this curious game too.

As its title indicates, the featured Pokémon in this game is none other than Magikarp!  Catch, feed and train Magikarp in order to maximize its jumping power.  Jumping too high may entice bird Pokémon to swoop on your fish.

Check out: The Magikarp Song 

Published by The Official Pokémon YouTube Channel on May 12, 2017

Media Sources:  "App Store" icon and "Pokémon: Magikarp Jump" icon - Apple iTunes;  Youtube video - The Pokémon Company;  Post banner - my own creation

Pokémon video games are played worldwide.  In fact, as of March, Pokémon X &Y is the top seller for the Nintendo 3DS console by having sold 16.11 million units.  Coming in second with 15.44 million units sold is Game Freak’s latest game: Pokémon Sun & Moon.  Released near the end of 2016, Pokémon Sun & Moon has been the center piece for this season’s competitive battling.

For months, Trainers all around the world have been attending events such as; Global Link battles, Premier Challenges, Midseason Showdowns, Pokémon Regionals, and the much anticipated Pokémon International Championships to earn enough Championship Points (CP) in order to get invited to the 2017 Pokémon World Championships.  Battles are comprised of teams of four; subjecting Trainers to the double battle format using only the Alola Pokédex.

With the International Challenges already being a third of the way finished, Trainers are busy refining and analyzing their strategies and possibly their teams before they battle in the 2017 North American International Championships. This is the last stop where Trainers can earn more CP before the Pokémon World Championships.  The World VGC is an invite only event; players that have earned top ranks in each rating zone and have the most CP will receive an invitation. 

UPDATE:
So far we have seen the European, Oceania, Latin American and most recently the North American International Championships unfold.  Listed below are the talented Trainers that placed first in each class in each event.  Congratulations to you and to everyone that has made it to the top!

European

• Masters: Miguel Marti de la Torre
• Senior: Jan Tillmann
• Junior: Matilda Petrasic

Oceania

• Masters: Zoe Lou
• Senior: Carson St. Denis
• Junior: Nicholas Kan

Latin American

• Masters: Ashton Cox
• Senior: Carson St. Denis
• Junior: Nicholas Kan

North American

• Masters: Christopher Kan
• Senior: Alfredo Chang-Gonzalez
• Junior: Nicholas Kan

Please take note of these particular Pokémon VGC Rules:

Sources: Pokemon.com, Statista.com

(Pokemon Sun/Moon covers ¹)

Pokémon Sun and Moon have been updated to version 1.2, coming with the following fixes ²:

Quote

• Pokémon being unable to attack and switch when Sky Drop is used and when knocked out by damage done by Spiky Shield.
• A glitch in Poké Pelago when entering a new month.
• A rare case where the game ends after using an Evolution item as the last item in your Bag.
• Scatterbug sometimes not learning Egg Moves.
• Eggs sometimes being able to be given items.
• A glitch ending the tournament when pre-registered for an online Friendly Competition (e.g. entry gets canceled or the Battle Teams get unlocked).

Existing battle videos will be unusable after the update, which is required for online play. It is unknown whether another ban wave is coming, but as always, we encourage you to avoid major save file edits when going online.

Sources

1. Pokémon Sun and Moon Official Website
2. Pokémon Global Link

Pokémon the Series: XYZ concluded Ash’s Kalos adventure with a well deserved trip back to his home in Pallet Town.  After all of the chaos that Team Flare caused in the Kalos region, I’m sure Ash could use some R&R.  Little did he know that a tropical vacation was in the near future!

Pokémon the Series: Sun & Moon features Ash learning the Alolan customs while living on Melemele Island in the Alola region.  Ash has always had a knack for making friends where ever he goes; nothing can isolate him!  With the help of his new pals, Ash discovers how exciting his newly chosen lifestyle can be.

According to Pokemon.com, this will be the 20^th season of the Pokémon cartoon.  The site also notes that episodes of Pokémon the Series: Sun & Moon will be aired on DisneyXD, switching from longtime host Cartoon Network.  This Friday, May the 12^th, Sun & Moon will debut in the United States on the DisneyXD channel.  Can’t wait? Catch the first two episodes now on Watchdisneyxd.go.com! Restriction apply.

Image source: watchdisneyxd.go.com

This month, Trainers have an excellent opportunity to acquire three new Mega Stones for their Pokémon in Pokémon Sun and Moon.  For the first time, we will be able to Mega Evolve our Abomasnow, Manectric and Tyranitar! 

From May 17th to May 25th Trainers may register to compete in this month’s 2017 International Challenge May Online Competition.  Battles will begin May 26th and last through May 28th.  This will be a double battle competition that restricts Trainers to use only their Pokémon from the Alola region.  Other rules and restrictions apply.  Head over to Pokémon Global Link for more details.

Trainer incentives:

• Abomasite
• Manectite
• Tyranitarite
• Championship Points

Mega Evolution does have its own advantages and disadvantages in battle, so naturally it doesn’t fit in with everyone’s strategies. However, these stones are only available when competing in this event.  Don’t miss out on this chance to add more content to your collection!

Pokemon XG: Next Gen has been released and is the world's first ever Pokemon XD:GoD hack!

For more details and download link: Pokemon XG Main Thread

Main Features:

- Physical/Special Split

- Gen VI type matchup chart including fairy type

- New set of shadow pokemon and other obtainable pokemon

- Moves and abilities from later generations

- More challenging opponents

Other features

Change Log:

Because of past PGL ban waves (and a potential future one), many are wondering if they can edit save files safely. The safest option is to simply not hack or to not use game sync, although some minor edits may be safe. The problem is that it is unclear on what the bans were based, and the Pokémon company hasn't exactly volunteered this information.

Here are the known causes of PGL bans:

• Getting 999 of every item (it's possible the bans are from a sub-set of items)
• Making illegal changes to Pokémon between game syncs
• Illegal Pokédex entries
• Items in the incorrect Bag Pocket
• Changing anything in the save that is static (like OT, Gender, Language, etc.)
• Getting all clothing (there's been mixed reports about this)

We have not received any reports of banning due to receiving hacked Pokémon in trades. Making other edits might be safe, but only as long as the result could have been accomplished without hacks given more effort.

By hacking your save file, you accept full responsibility of any consequences such as being banned. If you are banned, however, we would appreciate your input so we can learn more.

Thanks to everyone who posted in our previous threads about the bans for sharing their experiences, zenamez of GBAtemp for compiling the causes reported on GBAtemp, and to theSLAYER and Serebii for checking this information.

Image Source (Thanks to @\ from our IRC for suggesting this)

Sources: Me. [yeah, that's my game up there.]

According to the Japanese Pokémon Global Link website^[1] as reported by Serebii.net^[2],
7,651 more players have been hit with the 090-0212 ban wave, after being detected of having a modified game save.

This ban bars users from accessing Online Play services (Game Sync, Battle Competitions, Rating Battles, Global Missions).

Once again, The Pokémon Company has announced that they will continue their pursuit against people with edited save data.[1,2]

If you are affected by the ban, please let us know what kinds of edits you made,
so we can get a better idea what The Pokémon Company is looking for.

While we already some strong suspicions regarding the causes previously,
we urgently recommend not going online if you modified your save,
until we have more information on how these bans were triggered.

Sources:
[1] https://3ds.pokemon-gl.com/information/b87bc53f-7144-44ba-9a29-59bd00330d84
[2] http://serebii.net/news/2017/28-March-2017.shtml

@Dio_Vento has recently released his ROM hacks of Pokémon Sun and Pokémon Moon.  Based on his previous work, Pokémon Rutile Ruby and Pokémon Star Sapphire, these hacks aim to provide a legitimate challenge to players seeking something more from the latest Pokémon games.

Here's the trailer:

Features include (but are not limited to):

• Harsher level curve
• New trainer & gym teams
• NPC's using Mega Evolution
• Improved item availability
• Trade-based evolutions can be done in-game

Downloads, as well as more information, can be found in the project thread.

PKHeX has been updated to version 17.02.07, finally fixing the Trainer Info bug everyone loves to post about, among many other fixes and features.

Quote

17/02/07 - New Update:
 - Legality:
 - - Added: Legality indication for exported QR images (if legality check is available for origin).
 - - Added: Legality indication for Box/Party pkm slots (^ + opt-in via Options->Set to SAV).
 - - Fixed: More edge cases for legality checks.
 - Added: More Generation 7 trainer stat record labels. Thanks skywalker25 & Holla!
 - Added: G7TID -> TID/SID generator for Generation 7 Trainer Editor. Thanks RoC!
 - Added: QR exporting for non gen6/7 pkm. Only use is for sharing via image rather than file.
 - Fixed: Transferred markings are now applied correctly.
 - Fixed: Gen 2 inventory items TMHM cap raised from 1 to 99.
 - Fixed: Importing japanese pk1 files now transfer to generation 7 without errors.

Download:

Nintendo has released update 11.3.0-36.  It patches safehax, so if you do not have CFW installed, do not update if you wish to install it (instructions can be found here).  Without CFW, updating will prevent you from using save editors like PKHeX or ROM hacks until homebrew is updated.

Update: PKHeX has been updated yet again to version 17.01.31, implementing further improvements to overall system stability and other minor adjustments have been made to enhance the user experience.

Quote

17/01/31 - New Update:
 - Added: Default/Illegal(old code) fashion payloads for those wanting to undo/have anything.
 - Changed: Internal program version updated to .NET 4.6.
 - Changed: Improved exception checking for config & dll exceptions.
 - Fixed: Geolocation data for 6->7 criteria relaxed to no longer falsely flag.
 - Fixed: Alolan variant egg moves are now recognized correctly.
 - Fixed: Japanese Event VC Mew no longer flagged for OT name.
 - Fixed: Dream Ball inheritance check relaxed per new bank possibilities.
 - Fixed: Importing wc6 on gen7 game no longer invalidates the origin version.
 - Fixed: Setting Game Corner Coins to Gen1/2 saves is now capped at 9999.

The previous update 17.01.30 features few minor improvements and bug fixes, as detailed below.

The previous update 17.01.28 brings in support for migrated Virtual Console and previous-Gen Pokemon, through Bank, into Sun and Moon.

Download:

According to the Japanese Pokémon Global Link website[1] as reported by Serebii.net[2], thousands of people (5,954 to be precise) have been hit with bans from Online Play (Game Sync, Battle Competitions, Rating Battles, Global Missions).

Banned users will see error code 090-0212.[1,2]

The Pokémon Company has announced that they will continue their pursuit against people with edited save data.[1,2]

We urgently recommend not going online until we have more information on how these bans were triggered.

Sources:

[1] https://3ds.pokemon-gl.com/information/b87bc53f-7144-44ba-9a29-59bd00330d84

[2] http://serebii.net/news/2017/26-January-2017.shtml

The latest Pokémon Bank update has been released.  Those who have Pokémon Sun and Pokémon Moon can receive Mewnium Z, a Z-Crystal exclusive to Mew.  Additionally, Pokémon Transporter has been updated to support transferring from Generation 1 virtual console games.

Transferring Pokémon from generation 1 virtual console games will come in a separate update for the Pokémon Transporter.

In related news, @SciresM did some data-mining and found the text for Pokédex entries, which can be read below:

Source

(Pokemon Sun/Moon covers ¹)

Nintendo has released a patch for Pokémon Sun and Moon introducing the following game balance fixes ²:

Quote

• Fixes glitch that caused battles to not continue when Z-Memento and Z-Parting Shot were used on Battle spot
• Fixed a glitch that determined the wrong winner if the Rocky Helmet caused both players to lose their final Pokémon
• Fixed a glitch where Pokémon wouldn't learn moves after they evolved such as with Kadabra and Confusion
• Alterations to some Battle Tree Pokémon - Change of Kommo-o's move from Shell Smash to Draco Meteor
• Various Bug Fixes

Battle videos recorded before applying the update are incompatible with this patch and will be unplayable after installing it.

With regards to game hacking, this may break ROM hacks, depending on whether or not the ROM hack modified the game's executable.  If you are playing such a ROM hack, you will either need to refrain from updating or wait for the author to update the hack.  Save editors like PKHeX are unaffected.

@SciresM's SMPatcher has been updated to version 1.1 to provide compatibility with the update, and can be downloaded here ³.  If you are new to SMPatcher, it will modify the game executable to make QR scanning and PKHeX importing much similar.  In order to use it, you will need to have CFW, which can currently be installed using the latest firmware.  The recommended installation guide can be found here.  Here is a list of patches that SMPatcher can apply to Sun or Moon:

Quote

• Allows for the resigning of any QR type, via hooked QR decryption.
• Allows for the scanning of Injection QRs, generatable via PKHeX
• Grants unlimited QR scans/day
• Enables one to scan the same QR multiple times.
• Optionally, disable outlines from being drawn.

Sources:

1. Pokémon Sun and Moon Official Website
2. Serebii
3. SciresM's GitHub

Soundhax was released a few days ago, allowing homebrew access on the latest 3DS firmware: 11.2.  This allows the use of save editors like PKHeX and ROM hacks using HANS.

From Smealum's homebrew website:

Quote

You can now access homebrew through the 3DS's stock sound application! All you need to do is grab the right sound file over at nedwill's soundhax website, and place it at the root of your SD card along with the right otherapp payload. You can grab the right otherapp payload for your console below on this page. Don't forget to rename it to otherapp.bin and place it at the root of your SD card! 

It is very likely that this vulnerability will be patched in the next 3DS update, so if this interests you, do not update your 3DS until further notice.

PKHeX has been updated to version 16.12.31 introducing new features, bug fixes, and speed improvements.

Quote

 - Legality: Added Poké Pelago encounter cases.
 - Added: Battle Box slot indication separated for locked & unlocked slots. Locked slots remain un-editable.
 - Added: Record (trainer stat) editing (captured, battles, exp collected, etc) for Gen7.
 - Added: Starter Choice Event Constant editing.
 - Added: Relearn move suggestions for static encounters with relearn moves.
 - Added: Option to set NEW flag when giving items.
 - Added: Gender changing for Gen2, IVs will automatically update.
 - Added: Database filter for Clones and option to delete clones.
 - Updated: Database and Report windows now load/operate faster.
 - Fixed: Database slot deletion no longer throws an error.
 - Fixed: Showdown Set forme edge cases for new formes now import/export to Showdown's expected format.
 - Fixed: Setting a party slot via drag&drop now sets the current stat level.
 - Fixed: Memory arguments (items, species, etc) for Gen6 now constrained to legal Gen6 values.
 - Fixed: Gender Symbol half/full width setting for latin/logographic languages.
 - Fixed: Setting the item count to an empty string now defaults to zero.
 - Fixed: Illegal dates no longer cause issue for Trainer Editors.
 - Fixed: Transferring Gen3->Gen4 case re-added, and item transferring now behaves correctly.
 - Fixed: Transferring Gen3->XD/Colosseum now has the Pokémon appear with correct 'valid' flags.
 - Fixed: Fashion payload cheats no longer cause ingame crashes due to invalid dye values. Thanks Holla!

Download:

Until now, anyone with an 11.2 3DS would either need to get a hard mod or find an already-hacked 3DS in order to reliably manage save files for use with PKHeX or play ROM hacks.  These requirements are no longer applicable thanks to the 33c3 conference revealing several 3DS exploits today.  Here are some highlights of its findings as it relates to the 3DS:

Quote

• Soundhax - Excellent, convenient, and free userland primary that hacks the built in sound application with just an MP3 on the sd card. Will be released soon according to nedwill.

• Fasthax - New arm11 kernel expoit (like memchunkhax, waithax, etc.) also by nedwill. Works on latest firm and should be released soon just like Soundhax. Should allow nfirm downgrading on latest firm when more advanced dsiware injection techniques are released very soon.

• Method to dump arm9 bootrom detailed by derrek. Hash given as proof. The same technique has been worked on for months already by #Cakey devs, so this will likely take quite a bit more time for a public dump to show up. One benefit of bootrom dumping is faster PC based crypto stuff instead of slow 3ds methods. The second benefit is the next exploit:

• Sighax - The big one. Flaw discovered in the bootrom's RSA parsing process of the 3ds's firmware partition. This will allow us to sign our own custom firm and no more having to do risky downgrades and 100 step guides to get the OTP. Unfortunately, we need a bootrom dump to implement this and that is an issue, see above bullet point for why. You will also still need a way to actually write to system NAND, and even k11 hax usually isn't enough for that. Hardmod is also an option, but it's expensive and inconvenient. That should always be an option, at least, given sighax itself is unpatchable without hardware revision.

If you read either of our save management guides (NDS or 3DS) and needed to purchase additional hardware, you are advised to wait until these exploits are released before actually buying anything.  While your purchase would likely still do what you want it to do, free alternatives are coming soon.

Quote Source

Image Source

Please be aware that these resources may contain spoilers, so if you want everything to be a surprise, you should probably stop reading here. Still here? Here's the the results of the datamine:

Part 1: Starter Stats and Moves

Part 2: More Stats

Part 3: Even More Stats

Part 4: Legendary Stats

Part 5: Ultra Beast Stats

Part 6: Mythical Stats

Part 7: Game and story text

https://projectpokemon.org/research/sunmoon/gametext.txt

https://projectpokemon.org/research/sunmoon/storytext.txt

Part 8: Learn-sets

https://projectpokemon.org/research/sunmoon/learnsets.txt

Marshadow's Signature Move

Alolan Forms & Zygarde