theSLAYER

This event was distributed via Nintendo Zones at Pokemon Centers and Pokemon Store outlet in Japan.
This marks the first time Diancie is obtainable shiny.
 Species   Diancie   Nickname   (default, save lang)   OT   ポケセン   TID   12125   Distribution   Nintendo Zone   Location   a Pokémon Center   Dates   Dec 12 to Dec 31, 2015   PID   Shiny PID   Games   JP 3DS: ORAS    Lv. 50      Nature   Random   Ability   Clear Body (1)   Item   Normal Gem 
Classic   Moves   (ITALIC means Relearnable)   Diamond Storm   Moonblast   Reflect   Return   WC ID 131: 「いろちがいのディアンシー　プレゼント」's receiving text  0x07 Thank you for coming to the Pokémon Center! Please pick up your gift from the delivery girl in the game. いろちがいのディアンシー　プレゼント ポケモンセンターから　かんしゃを　こめて
とっておきの　プレゼント！
いままで　だれも　みたことのない
いろちがいのディアンシーを　プレゼント！

Between 17th June to 14th July 2017, AEON Malls in Japan will be giving away Serial Code,
for various partner Pokemon of Ash's classmates (in the anime).

These Pokemon also received a re-distribution at Pokemon Centers via Local Wireless.
While they look identical to the initial distribution, their wonder card ID is different,
hence allowing repeats.
  Pokemon Physical Serial Code
Collection dates
(Only one allowed) Serial Code End
Redemption Dates
  Pokemon Center
Local Wireless Dates
(Only one type, Once per day) Mallow's Steenee 17 Jun to 25 Jun, 2017 04 Jul, 2017 22 Jul to Aug 13, 2017 Kiawe's Turtonator 26 Jun to 04 Jul, 2017 14 Jul, 2017 22 Jul to Aug 13, 2017 Lillie's Alolan Vulpix "Shiron" 05 Jul to 14 Jul, 2017 24 Jul, 2017 22 Jul to Aug 13, 2017  
 Species   Turtonator   Nickname   (default, save lang)   OT   カキ   TID   170626   Distribution   (Various)   Location   the Pokémon animated show   Dates   (Various)   PID   Cannot Be Shiny   Games   JP 3DS: SM (Serial - 0235)
All Region: SM (Local - 0244)   Lv. 30     Met Lv. 27                                                                  Nature   Brave   Ability   Shell Armor (1)   Item   Moomoo Milk   Bundled Item   None   Card Per Save   (See above) 

Classic   Moves   (ITALIC means Relearnable)   Flamethrower   Shell Trap   Dragon Tail   (None)   WC ID: 「カキのバクガメス　プレゼント」's receiving text 0x2D Thank you for coming to the store! Please pick up your gift from the deliveryman in any Pokémon Center. カキのバクガメス　プレゼント ヴェラかざんのごとく　もえる
あつきこころ！
カキの　バクガメスを　プレゼント！
これからも　アニメでの　かつやくを
たのしみにしていてね！ Format Ver.1.0.5-4, Post Updated Date:20171105_1609

This Shiny Jirachi was distributed to HKTW players with Pokemon XYORAS,
to celebrate Christmas 2015.
Only English wonder card, via EU and JP units.
 Species   Jirachi   Nickname   (default, save lang)   OT   Nintendo HK   TID   12015   Distribution   Serial Code   Location   a lovely place   Dates   Dec 12, 2015 
to Jan 31, 2016   PID   Shiny PID   Games   EU & JP 3DS: XYORAS    Lv. 25      Nature   Random   Ability   Serene Grace (1)   Item   Star Piece 
Classic   Moves   (ITALIC means Relearnable)   Wish   Confusion   Swift   Happy Hour   WC ID 145: 「Christmas Present　"Shiny Jirachi"」's receiving text  0x35 Thank you for receiving this distribution! Please pick up your gift from the delivery girl in any Pokémon Center. Christmas Present　"Shiny Jirachi" Receive a shiny Jirachi equipped
with a special move "Happy Hour"!
Wish you a Merry Christmas !

This event was initially distributed by having players use the Nintendo Zone app at 7SPOTs, in order to grab a serial code,
to commemorate the upcoming release of Movie 20: Pokemon I Choose You in Japan.
The last day to receive a code is August 20th, and the code expiry date is August 28th.
A second distribution was held at Pokemon Centers in Japan via Local Wireless.
Charizard, Piplup or Lucario were distributed together, and only one of three can be received once per day, and players can only receive one of each per game.
 
Distribution Mode Regions Receivable Wonder Card ID Dates Serial Code (only one) JP 3DS Only 0240 Aug 01 to Aug 28, 2017 Local Wireless (only one type;one per day) Any Region 3DS 0245 Aug 22 to Sep 03, 2017  
 Species   Piplup   Nickname   (default, save lang)   OT   マコト   TID   170715   Distribution   (Various)   Location   2017 Pokémon Movie   Dates   (Various)   PID   Cannot Be Shiny   Games   SM; (see above)    Lv. 30     Met Lv. 5                                                                  Nature   Hardy   Ability   Torrent (1)   Item   None   Bundled Item   None   Card Per Save   (See above) 

Wishing   Moves   (ITALIC means Relearnable)   Hydro Pump   Bubble Beam   Whirlpool   Drill Peck   WC: 「キミにきめた！　マコトのポッチャマ」's receiving text 0x2C Thank you for playing Pokémon! Please pick up your gift from the deliveryman in any Pokémon Center. キミにきめた！　マコトのポッチャマ げんきいっぱいで　おとこまさりな
トレーナーの　しょうじょ　マコト
パートナーの　ポケモンは
ポッチャマ　キミにきめた！ Format Ver.1.0.5-4, Post Updated Date:20171105_1639

This gift was given away to players via Local Wireless at Pokemon Centers in Japan, to commemorate the 20th Anniversary of Pokemon Centers!
     Species   Shaymin   Nickname   (default, save lang)   OT   ポケセン   TID   180425   Distribution   Local Wireless   Location   a Pokémon Center   Dates   Apr 25 to Jun 30, 2018   PID   Cannot Be Shiny   Games   All Regions 3DS: SM USUM                                                               Lv. 20    Nature   Random   Ability   Natural Cure (1)   Item   Everstone   Bundled Item   None   Card Per Save   Only One Allowed    Moves   (ITALIC means Relearnable)   Return   Growth   Seed Flare   Celebrate   WC ID 289: 「20しゅうねん　かんしゃの　シェイミ」's receiving text 0x08 Thank you for coming to the Pokémon Center! Please pick up your gift from the deliveryman in the game.

Premier 20しゅうねん　かんしゃの　シェイミ 20しゅうねんを　むかえた
ポケモンセンターから
かんしゃの　きもちを　こめて
シェイミを　プレゼント！
これからも　ポケモンセンターで
すてきな　おもいでを　つくってね！ Format Ver.1.0.6-2, Post Updated Date:20180421_2235

Transferring Meltan from Pokémon Go to Let's Go Pikachu and Lets Go Eevee is the only way for the games to receive Meltan, as this Pokémon cannot be in encountered in those games. The Original Trainer for Pokémon Go was changed for privacy purposes.
Shiny Meltan (captured by @wo0ts) was temporarily added to the shiny pool during the Lunar New Year Event (2019).
During the Lunar New Year Event (2019) in Pokémon Go, shiny Meltan has a chance of appearing from using the Mystery Box, duration listed below.
This event also marked the first time a Shiny Meltan was made available to players.

The cool down between box usage were temporarily reduced to 3 days instead of the standard 7 days.


The slated period for the event was between Feb. 5, 2019, at 1 p.m. PST (GMT -8) to Mar. 4, 2019, at 11:59 p.m. PST (GMT -8).
   Go Park Transfer  Species   Meltan   TID   (recipient)   Distribution   Pokemon Go   Location   GO Park complex   Dates   Any date of transfer   PID   Cannot Be Shiny 
Can Be Shiny   Games   Let's Go Pikachu & Eevee   Nature   Random   Card Per Save   Multiples Allowed                                                               
  Lv. 1 to 40       Moves   (ITALIC means Relearnable)   (None)   (None)   (None)   (None)

   (no ribbons)  OT Name    Nickname   LANG  (recipient)    (default name)   JPN   (recipient)    (default name)   ENG   (recipient)    (default name)   FRE   (recipient)    (default name)   GER   (recipient)    (default name)   ITA   (recipient)    (default name)   SPA   (recipient)    (default name)   KOR   (recipient)    (default name)   CHS   (recipient)    (default name)   CHT  Format Ver.1.0.6-3, Post Updated Date:20190105_0509

@ajxpk's gif for the Eon Ticket process, with the English Version as an example:


Original Thread and Credits!

Movie 2013 Genesect
This Red Genesect was distributed at movie theaters playing the 16th Pokémon movie.
It was also distributed in the same manner at Fun Box stores in Taiwan from August 16th to September 15th.
Its Attack and Speed IVs are set to 31.
 
 Species   Genesect   Nickname   (default, save lang)   OT   えいがかん   TID   07133   Distribution   Local Wireless   Location   Pokémon Movie 13   Dates   Jul 13 to Sep 30, 2013   PID   Shiny PID   Games   BW B2W2    Lv. 100                                                                  Nature   Hasty   Ability   Download (1)   Item   Choice Scarf 
Wishing   Moves       Extreme Speed   Techno Blast   Blaze Kick   Shift Gear   WC ID 136: 「あかいゲノセクト　プレゼント」's receiving text 0x04 Thank you for coming to see the 2013 Pokémon Movie! Please pick up your gift from the deliveryman in any Pokémon Center.

Yellow Forest is a course that can be unlocked for the Pokéwalker.
Players can unlock this course when they attend an event that distributes the course.
The HM Move has to be removed in order to be legitimately transferred up to later generations.
This Pikachu, was obtained from ReignOfComputer's PC.

This event was the first Pokemon Bank event distributed to players,
and it was distributed to players that had an active subscription of Pokemon Bank during the duration of the distribution.

The Dates for this distribution as follows:
Dec 25, 2013 (JP, KO)
Feb 4, 2014 (EU)
Feb 5, 2014 (US)
to Sep 30 2014
 Species   Celebi   Nickname   (default, save lang)   OT   (recipient)   TID   (recipient)   Distribution   Pokemon Bank   Location   a lovely place   Dates   Various Dates   PID   Cannot Be Shiny   Games   XY    Lv. 10      Nature   Random   Ability   Natural Cure (1)   Item   None 
Classic   Moves   (ITALIC means Relearnable)   Recover   Heal Bell   Safeguard   Hold Back

This event was given away to commemorate The Year of Legendary Pokémon via Serial Code (US 3DS) or via Nintendo Network (EU 3DS).
The gift received between Pokémon Sun & Moon and Pokémon Ultra Sun & Ultra Moon will slightly differ, in areas such as held item, level and moveset.

This Entei can only received on Pokémon Sun & Ultra Sun, while it is normally able to be encountered the Ultra Space Wilds of Pokémon Ultra Moon.

The Nintendo Network redemption (EU 3DS) runs from April 4th to 25th, 2018.
The Serial Code cards (US 3DS) can be obtained at Target stores between April 22 to 29, 2018.
The end date for the serial code redemption is not known at this point.
     Species   Entei   Nickname   (default, save lang)   OT   2018 Legends   TID   042218   Distribution   (Various)   Location   a lovely place   Dates   (Various)   PID   Cannot Be Shiny   Games   US & EU 3DS: S                                                                Lv. 60    Nature   Random   Ability   Pressure (1)   Item   None   Bundled Item   None   Card Per Save   Only One Allowed    Moves   (ITALIC means Relearnable)   Stomp   Bite   Swagger   Lava Plume   WC ID 648: 「Fiery Entei!」's receiving text 0x2C Thank you for playing Pokémon! Please pick up your gift from the deliveryman in any Pokémon Center.

Classic Fiery Entei! The Legendary Pokémon Entei leaps into
battle with volcanic might!
Kindle the flames of victory when you
send Entei into the fray! Format Ver.1.0.6-2, Post Updated Date:20180404_0727
     Species   Entei   Nickname   (default, save lang)   OT   2018 Legends   TID   042218   Distribution   (Various)   Location   a lovely place   Dates   (Various)   PID   Cannot Be Shiny   Games   US & EU 3DS: US                                                                Lv. 100    Nature   Random   Ability   Pressure (1)   Item   Gold Bottle Cap   Bundled Item   None   Card Per Save   Only One Allowed    Moves   (ITALIC means Relearnable)   Sacred Fire   Stone Edge   Iron Head   Flame Charge   WC ID 648: 「Fiery Entei!」's receiving text 0x2C Thank you for playing Pokémon! Please pick up your gift from the deliveryman in any Pokémon Center.

Classic Fiery Entei! The Legendary Pokémon Entei leaps into
battle with volcanic might!
Kindle the flames of victory when you
send Entei into the fray! Format Ver.1.0.6-2, Post Updated Date:20180404_0727

Species   Magikarp   Nickname   ひろしま (save lang)   OT   ポケセン   TID   06265   Distribution   Local Wireless   Location   a Pokémon Center   Dates   Jun 26 to Aug 31, 2015   PID   Chance of Shiny   Games   All Regions 3DS: XYORAS                                                               Lv. 1    Nature   Random   Ability   Swift Swim (1)   Item   Stardust   Card Per Save   Multiples Allowed    Moves   (ITALIC means Relearnable)   Splash   Celebrate   Happy Hour   (None)   WC ID 95: 「ひろしまの　コイキング」's receiving text 0x07 Thank you for coming to the Pokémon Center! Please pick up your gift from the delivery girl in the game.
  ひろしまの　コイキング ポケモンセンターヒロシマ
オープンを　きねんして
コイキングを　プレゼントしよるよ！
なんびきでも　つれるけぇ
ようけ　つっていきんさい！ Format Ver.1.0.6-2, Post Updated Date:20180307_1103

Between 17th June to 14th July 2017, AEON Malls in Japan will be giving away Serial Code,
for various partner Pokemon of Ash's classmates (in the anime).

These Pokemon also received a re-distribution at Pokemon Centers via Local Wireless.
While they look identical to the initial distribution, their wonder card ID is different,
hence allowing repeats.
  Pokemon Physical Serial Code
Collection dates
(Only one allowed) Serial Code End
Redemption Dates
  Pokemon Center
Local Wireless Dates
(Only one type, Once per day) Mallow's Steenee 17 Jun to 25 Jun, 2017 14 Jul, 2017 22 Jul to Aug 13, 2017 Kiawe's Turtonator 26 Jun to 04 Jul, 2017 14 Jul, 2017 22 Jul to Aug 13, 2017 Lillie's Alolan Vulpix "Shiron" 05 Jul to 14 Jul, 2017 24 Jul, 2017 22 Jul to Aug 13, 2017
This is also one of the odd times, that a Pokemon with a Japanese nickname, has it's language set to follow the game save's language,
meaning it can end up not being Japanese (JPN), if the receiving game is of a different language.
 
 Species   Vulpix (Alola)   Nickname   シロン (save lang)   OT   リーリエ   TID   170705   Distribution   (Various)   Location   the Pokémon animated show   Dates   (Various)   PID   Cannot Be Shiny   Games   JP 3DS: SM (Serial - 0236) 
All Region: SM (Local - 0244)    Lv. 10     Met Lv. 1                                                                  Nature   Modest   Ability   Snow Cloak (1)   Item   Silk Scarf   Bundled Item   None   Card Per Save   (See above) 

Classic   Moves   (ITALIC means Relearnable)   Powder Snow   (None)   (None)   (None)   WC: 「リーリエのシロン　プレゼント」's receiving text 0x2D Thank you for coming to the store! Please pick up your gift from the deliveryman in any Pokémon Center. リーリエのシロン　プレゼント リーリエが　いっしょうけんめい
おせわをして　タマゴから　かえった
アローラロコンの　シロンを
プレゼント！
これからも　アニメでの　かつやくを
たのしみにしていてね！ Format Ver.1.0.5-4, Post Updated Date:20171105_1623

Nobunaga's Black Rayquaza
This shiny, color-variant Rayquaza was distributed via Nintendo Wi-Fi Connection as well as through the Nintendo Zone, 3DS Stations, and at Pokémon Centers. It was distributed to promote Pokémon + Nobunaga's Ambition. It is based on Nobunaga's partner Pokémon from the game.
Wondercard ID 059 PID Random Games BW Type Wi-Fi / Local Dates 03.17.2012-04.16.2012 Nickname レックウザ Gender Genderless Level 70 Nature Random Ability Air Lock OT ノブナガ SID 00000 Location Faraway place Ribbon Classic Ribbon Ball Cherish Ball Held Item --- Moves Dragon Pulse Ancient Power Outrage Dragon Dance

This event was given away to commemorate Pokemon Bank's first support for Pokemon Virtual Console games and Pokemon Sun & Moon.
This Z-crystal is not obtainable prior to this event.
As Z-crystals cannot be traded, there is no other way to obtain Mewnium Z (besides hacking).
While this event can be received by any Pokemon Sun and Moon game of any region or game save language, the wonder card only comes in English.
 
Pokémon Bank Mewnium Z
        x 1 0x37 Please pick up your gift from the deliveryman in any Pokémon Center.             Pokemon Bank  |  Jan 25 to Oct 02, 2017  |  All 3DS: SM

Distribution Title メガトウキョーの　リザードン Wondercard ID 139     PID Shiny PID     Games ORAS Type Local Wi-Fi Dates Jan 1 to
31, 2016 Species Charizard Nickname (default) Gender Male/Female Level 36 Nature Random Ability Blaze (1) OT メガトウキョ TID 12124 Location a Pokémon Center Ribbon Premier Ball Cherish Ball Held Item Charizardite Y Moves Overheat Solar Beam Focus Blast Hold Hands Relearn
Moves Hold Hands (None) (None) (None) Receiving Text 0x07 Thank you for coming to the Pokémon Center! Please pick up your gift from the delivery girl in the game.

Jirachi was distributed via the PAL version of the Pokemon Channel game to Pokemon Ruby and Sapphire,
after the player has unlocked the full episode of Pichu Bros. in the Party Panic.

This Pokemon was distributed via Local Wireless to the participants of the Pokémon North American International Championship 2017 held in Indianapolis.
Prior to this event, there was no information distributed, to indicate that this Pokemon would be given away.
 
 Species   Arcanine   Nickname   (default, save lang)   OT   NA Champs 17   TID   063017   Distribution   Local Wireless   Location   a lovely place   Dates   Jun 30 to Jul 02, 2017   PID   Cannot Be Shiny   Games   All Regions 3DS: SM    Lv. 50                                                                  Nature   Random   Ability   Intimidate (1)   Item   Leftovers   Bundled Item   None 
Event   Moves   (ITALIC means Relearnable)   Flare Blitz   Extreme Speed   Will-O-Wisp   Protect   WC ID 615: 「Heat up your battles with Arcanine!」's receiving text 0x2C Thank you for playing Pokémon! Please pick up your gift from the deliveryman in any Pokémon Center. Heat up your battles with Arcanine! Here's your chance to bring one of
the most intimidating Pokémon to
every fight!

This Pokemon was distributed via serial code by various distributors (including Nintendo Zone app viewer at specific Nintendo Zones), to commemorate its appearance the 20th Movie.
Some distributors may require players to pre-order Pokemon Ultra Sun and Ultra Moon.
While US distribution is slated for October 9, and EU distribution is slated for October 1,
Marshadow could be redeemed as early as September 29, if you already have the codes.
 
 Species   Marshadow   Nickname   (default, save lang)   OT   Mt. Tensei   TID   100917   Distribution   Serial Code   Location   a lovely place   Dates   Oct 01 to Oct 23, 2017   PID   Cannot Be Shiny   Games   EU 3DS: SM    Lv. 50                                                                  Nature   Random   Ability   Technician (1)   Item   None   Bundled Item   Marshadium Z 

Classic   Moves   (ITALIC means Relearnable)   Spectral Thief   Close Combat   Force Palm   Shadow Ball   WC ID 626: 「Das Mysteriöse Pokémon Marshadow」's receiving text 0x2C Thank you for playing Pokémon! Please pick up your gift from the deliveryman in any Pokémon Center. Das Mysteriöse Pokémon Marshadow Das geheimnisvolle Marshadow schleicht sich
mit seiner einzigartigen Attacke Diebesschatten
in den Kampf und lässt Gegner mit seiner
überwältigenden Z-Attacke Sterne sehen! Format Ver.1.0.5-3, Post Updated Date:20170929_1500

This gift was given to players that have an active Pokémon Bank subscription during the distribution period.
This is the first time this gift's hidden ability can be obtained legitimately.
     Species   Passimian   Nickname   (default, save lang)   OT   (recipient)   TID   (recipient)   Distribution   Pokémon Bank   Location   Pokémon Bank   Dates   Mar 28 to Oct 31, 2019   PID   Cannot Be Shiny   Games   SM USUM                                                                Lv. 50    Nature   Random   Ability   Defiant (HA)   Item   None   Bundled Item   None   Card Per Save   Only One Allowed    Moves   (ITALIC means Relearnable)   Close Combat   U-turn   Knock Off   Gunk Shot   WC ID 0: 「Pokémon Bank」's receiving text 0x37 Please pick up your gift from the deliveryman in any Pokémon Center.

Classic Format Ver.1.0.7-0, Post Updated Date:20190328_2318

This event was distributed to commemorate the Japanese Cinematic release of Pokemon the Movie 20: I Choose You!
Serial codes for this event were being given away for pre-ordering the movie tickets, and another Pikachu can be redeemed if you have another code.
These serial codes are region locked to Japan 3DSes only.
 
 Species   Pikachu (Unova Cap)   Nickname   (default, save lang)   OT   サトシ   TID   100923   Distribution   Serial Code   Location   2017 Pokémon Movie   Dates   May 31 - Jun 12, 2017 
Aug 30 - Sep 11, 2017   PID   Cannot Be Shiny   Games   JP 3DS: SM    Lv. 14                                                                  Nature   Hardy   Ability   Static (1)   Item   None   Bundled Item   Pikashunium Z   Card Per Save   Multiples Allowed 

Wishing   Moves   (ITALIC means Relearnable)   Thunderbolt   Quick Attack   Iron Tail   Volt Tackle   WC ID 223: 「サトシのピカチュウ（イッシュキャップ）」's receiving text 0x03 Thank you for coming to see the 2017 Pokémon Movie! Please pick up your gift from the deliveryman in any Pokémon Center. サトシのピカチュウ（イッシュキャップ） イッシュちほうに　おりたった　そのひ
でんせつの　ポケモンの　かげを　みる
サトシと　ピカチュウ
すこしの　ふあんと
かぞえきれない　たのしみを　むねに
だいぼうけんを　くりひろげる！ Format Ver.1.0.5-4, Post Updated Date:20171105_1711

Distributions of the same event:
           

Between the period of May 13 to June 23, 2017, Pokemon Centers across Japan distributed one of the (then) 8 Eeveelutions to players via Local Wireless (region free).
Players could only obtain one Eeveelution per day, per save.

The distribution was to promote the various Eevee and Colorful Friends merchandise that was being sold.

While the promotion is named Eevee and Colorful Friends, Eevee itself wasn't distributed; only Eeveelutions were distributed.
 
 Species   Espeon   Nickname   (default, save lang)   OT   ポケセン   TID   170513   Distribution   Local Wireless   Location   a Pokémon Center   Dates   May 13 to Jun 23, 2017   PID   Cannot Be Shiny   Games   JP 3DS: SM    Lv. 50                                                                  Nature   Random   Ability   Magic Bounce (HA)   Item   None   Bundled Item   None   Card Per Save   Multiples Allowed 

Classic   Moves   (ITALIC means Relearnable)   Psychic   Dazzling Gleam   Shadow Ball   Reflect   WC ID 230: 「イーブイとカラフルフレンズ」's receiving text 0x08 Thank you for coming to the Pokémon Center! Please pick up your gift from the deliveryman in the game. イーブイとカラフルフレンズ 「イーブイとカラフルフレンズ」に
あそびに　きてくれて　ありがとう！
こせい　ゆたかな　みりょくを　もつ
イーブイの　しんかけいの　ポケモンを
プレゼントするよ！
バトルで　あいぼうにしてね♪ Format Ver.1.0.5-4, Post Updated Date:20171105_1549

Distributions of the same event:
               

This event was distributed by having players use the Nintendo Zone app at 7SPOTs, in order to grab a serial code, to commemorate the upcoming release of Movie 20: Pokemon I Choose You in Japan.
This is the "fixed distribution" that replaces the "glitched distribution" (and the glitched one was only online for around for 9 hours).

The " ☆ " that was in the original OT is an invalid character, so when any type of trade is done,
it'll either become a " Sun." or " Moon." variation, based on receiving game and language. The invalid OT stays, if transferred between games via PokeBank.

A second distribution was held at Pokemon Centers in Japan via Local Wireless.
While it looks identical to the initial distribution, the wonder card IDs between both distributions are different, hence allowing repeats.
 
Distribution Mode Regions Receivable Wonder Card ID Dates Serial Code JP 3DS Only 0238 Jul 11 to Aug 07, 2017 Local Wireless Any Region 3DS 0246 Sep 04 to Sep 14, 2017  
 Species   Mew   Nickname   (default, save lang)   OT   ２０ＴＨ   TID   980718   Distribution   Serial Code   Location   a Pokémon movie   Dates   (Various)   PID   Cannot Be Shiny   Games   SM    Lv. 50                                                                  Nature   Random   Ability   Synchronize (1)   Item   None   Bundled Item   None   Card Per Save   Only One Each 

Wishing   Moves   (ITALIC means Relearnable)   Psychic   Barrier   Metronome   Transform   WC: 「えいが「ミュウツーの逆襲」のミュウ」's receiving text 0x2C Thank you for playing Pokémon! Please pick up your gift from the deliveryman in any Pokémon Center. えいが「ミュウツーの逆襲」のミュウ ポケモンえいが　20さくめの
こうかいを　きねんして
1さくめに　とうじょうした
まぼろしのポケモン　ミュウを
プレゼント！ Format Ver.1.0.5-4, Post Updated Date:20171105_1651

For players in Japan, a Shiny Groudon or Shiny Kyogre was given away via Serial code, for any purchase of Pokemon Ultra Sun & Ultra Moon from participating stores.
     Species   Kyogre   Nickname   (default, save lang)   OT   ウルトラ   TID   180113   Distribution   Serial Code   Location   a lovely place   Dates   Jan 13 to Mar 19, 2018   PID   Shiny PID   Games   JP 3DS: US                                                                Lv. 60    Nature   Random   Ability   Drizzle (1)   Item   None   Bundled Item   None   Card Per Save   Only One Allowed    Moves   (ITALIC means Relearnable)   Ice Beam   Origin Pulse   Calm Mind   Muddy Water   WC ID 276: 「いろちがいのカイオーガ　プレゼント」's receiving text 0x2C Thank you for playing Pokémon! Please pick up your gift from the deliveryman in any Pokémon Center.

Classic いろちがいのカイオーガ　プレゼント ハウオリシティの　ショッピングモールで
あいいろのたまを　てにいれて　もたせると
バトルちゅう　ゲンシカイキして
くろい　ゲンシカイオーガに　なれるぞ！ Format Ver.1.0.6-0, Post Updated Date:20180119_2257

This event was distributed to players to commemorate the Japanese Cinematic release of Pokémon Movie 21: Everyone's Story.
Serial codes for this event were given to players that pre-ordered the movie tickets.
These serial codes are region locked to Japan 3DSes only.
     Species   Lugia   Nickname   (default, save lang)   OT   フウラシティ   TID   180413   Distribution   Serial Code   Location   2018 Pokémon Movie   Dates   Apr 13 to Sep 30, 2018   PID   Cannot Be Shiny   Games   JP 3DS: SM USUM                                                                Lv. 100    Nature   Random   Ability   Multiscale (HA)   Item   None   Bundled Item   None   Card Per Save   Multiples Allowed    Moves   (ITALIC means Relearnable)   Aeroblast   Hurricane   Defog   Tailwind   WC ID 288: 「かぜのルギア　プレゼント」's receiving text 0x04 Thank you for coming to see the 2018 Pokémon Movie! Please pick up your gift from the deliveryman in any Pokémon Center.

Wishing かぜのルギア　プレゼント いちねんに　いちど
かぜまつりのひに　あらわれる
でんせつのポケモン　ルギア
おおきな　つばさを　はばたかせ
きょうりょくな　かぜを　くりだす！ Format Ver.1.0.6-2, Post Updated Date:20180412_1555