theSLAYER

This page hosts the shadow and purified versions of the Shadow Lugia obtained during the narrative of XD: Gale of Darkness.
More Colosseum and XD Pokémon can be found at this page.
 
Some images:

This page hosts the shadow and purified versions of the Shadow Salamence obtained during the narrative of Pokémon XD: Gale of Darkness.
More Colosseum and XD Pokémon can be found at this page.

This event was distributed to players with a 3DS of US, EU or TW regions, via common serial code.
The code was accurately guessed to be PIKACHU20, hours before its reveal on official sites.

The same code can be used to redeem other variations of this Pikachu, provided your save file hasn't received one via wonder card.
The variations receivable follows a schedule.

This Pokemon was accidentally uploaded early, for players playing Pokemon Moon in Spanish, on EU 3DS.
The incorrect early distribution was only fixed after 11 hours.
(Though due to server caching problems, users could continue to receive it up to October 12)
 
 Species   Pikachu (Alola Cap)   Nickname   (default, save lang)   OT   Ash   TID   120516   Distribution   Serial Code   Location   a lovely place   Dates   Oct 10 to Oct 12, 2017 
& Oct 24 to Oct 30, 2017   PID   Cannot Be Shiny   Games   EU 3DS: M    Lv. 19                                                                  Nature   Hardy   Ability   Static (1)   Item   None   Bundled Item   Pikashunium Z 

Wishing   Moves   (ITALIC means Relearnable)   Thunderbolt   Quick Attack   Iron Tail   Electro Ball   WC ID 627: 「El Pikachu (Gorra Alola) de Ash」's receiving text 0x2C Thank you for playing Pokémon! Please pick up your gift from the deliveryman in any Pokémon Center. El Pikachu (Gorra Alola) de Ash Ash y Pikachu se encontrarán con
Pokémon increíbles y feroces combates
en la región de Alola.
¡Comienza una nueva y apasionante
aventura con este famoso dúo! Format Ver.1.0.5-3, Post Updated Date:20171010_1543

This event was distributed to players that went to the WCS Tournament Selection Round held in South Korea, for the duration of May 5th to May 7th, 2017.
This was also distributed for a second time for the period of Aug 19th to Aug 20th, 2017,
during the Team Battle Live comptetion held at Hyundai Department Store 10th Floor Topaz Hall (Cultural Centre), Pangyojeom in Gyeonggido, South Korea.
 
This Mew, would be the first Mew that can have CHS and CHT as it's language.
 
 Species   Mew   Nickname   (default, save lang)   OT   WCSK17   TID   170505   Distribution   Infrared   Location   a lovely place   Dates   Various   PID   Cannot Be Shiny   Games   All Regions: SM    Lv. 5      Nature   Random   Ability   Synchronize (1)   Item   None   Bundled Item   None 
Classic   Moves   (ITALIC means Relearnable)   Pound   (None)   (None)   (None)   WC ID 1112: 「환상의 포켓몬 뮤 선물」's receiving text  0x2B Thank you for coming to the Pokémon event! Please pick up your gift from the deliveryman in any Pokémon Center. 환상의 포켓몬 뮤 선물 대한민국 대표선발전을 기념하여
환상의 포켓몬 뮤를 선물합니다!

This event was distributed to players as an egg, at New York Pokemon Center.
 
 Species   Chansey (EGG)   Nickname   (default, save lang)   OT   (recipient)   TID   (recipient)   Distribution   PCNY   Location   (fateful encounter)   Dates   Dec 16, 2004 
to Jan 02, 2005   PID   Chance of Shiny   Games   FR LG    Lv. 5      Nature   Timid    Ability   Serene Grace (2)   Item   None      Moves       Sweet Scent   Wish   (None)   (None)

Distribution Title Johto Classic Miltank Wondercard ID 1514     PID Cannot Be Shiny Games ORAS Type Serial Code Dates Jun 7 -
Jul 31, 2016 Species Miltank Nickname (default) Gender Female Level 20 Nature Random Ability Scrappy (2) OT Whitney TID 5276 Location the Johto region Ribbon Classic , Ball Cherish Ball Held Item None Moves Rollout Attract Stomp Milk Drink Relearn
Moves Rollout Attract Stomp Milk Drink Receiving Text 0x37 This is a gift from the Pokémon Global Link! Please pick up your gift from the delivery girl in any Pokémon Center. Distribution Text Thank you for participating in the
Johto Classic Online Competition!
It's Whitney's Miltank!
Whitney is the Gym Leader of Johto's
Goldenrod City Gym.  

This entry was transferred from from Pokémon Go to Let's Go Pikachu and Lets Go Eevee.
The Original Trainer for Pokémon Go was changed for privacy purposes.
Ekans and Koffing was added to the shiny pool permanently as part of the Team GO Rocket Arrival event.
The event lasted between Thursday, July 25, 2019, at 1 p.m. until Thursday, August 1, 2019, at 1 p.m. PDT (GMT −7).
This page holds a GP1 format (to be inserted into Go Park using PKHeX, or dragged to the left side of PKHeX and converted in .PB7)

This Banette was obtained through using a password found in October issues of Nintendo Power magazine,
distributed for the 2011 PGL Dream World Halloween, obtainable between September 15th, 2011 to March 1st, 2012.
The Password: NPCHARACTER

This page also hosts a file from @Got_Eevees and the relevant screenshots.
 
PID 2671435423 Nickname Banette Gender Male Level 37 Nature Docile OT PPorg SID 07522 Location Entree Forest Ball Dream Ball Moves Faint Attack Hex Shadow Ball Cotton Guard

This Super Secret Base allows users to farm for EXP, by battling the Gym Leader PPorg who has 3x Blissey.

It can be located south of the Shoal Cave. Flying straight to Route 125 would land the player at the mini islet that hosts the SSB.

Ahiru's Wonderland is apparently an infamous site that hoards event Pokemon from Japan, back in Gen 3 days.

Relevant screenshots of the page will match the relevant save data uploaded.
 
Jan 1, 2019 edit: @shadowofdarkness shared some files he downloaded, probably back in 2007.
Interestingly, it went beyond Gen 3, and contained various Gen 4 files.

Do note that:
1. .stk files are a bulk batch of files used with pokestock
2. There appears to be some files being marked (with Pokerus) in the saves, use at your own risk.

Distribution Title ¡Un Beldum variocolor! Wondercard ID 1504     PID Shiny PID Games ORAS Type Online Wi-Fi Dates Nov 21 2014 -
Jan 14 2015 Species Beldum Nickname (default) Gender Genderless Level 5 Nature Random Ability Clear Body (1) OT Máximo TID 11214 Location an online Present Ribbon Classic , Ball Cherish Ball Held Item Metagrossite Moves Hold Back Iron Head Zen Headbutt Iron Defense Relearn
Moves Hold Back (None) (None) (None) Receiving Text 0x35 Thank you for receiving this distribution! Please pick up your gift from the delivery girl in any Pokémon Center.  

From 15th July (Sat) to 23rd July (Sun), Eevee Friends was distributed via Infrared,
to players that visited the Pokemon Pop-up Store at Hyundai Department Store Shinchon Station Underground 2F Connection Passage Graduation Tempyo.
This is a once per day event, meaning it'll take 8 different days to collect all the Eeveelutions.

This page has the WC7 and also photographs of the physical location, courtesy of @BLACKBIRD & @katsuya!
 
Distributions of the same event:
               

Ageto Celebi comes from the Bonus Disc for the Japanese Pokemon Colosseum.
Besides the single Celebi attached,
A zipped folder of @Nigoli's 111 Ageto Celebi are also attached.

The single file:
セレビィ (Celebi)
IVs: 11 HP / 20 Atk / 5 Def / 26 SpA / 1 SpD / 3 Spe
Ability: Natural Cure
Level: 10
Quirky Nature
- Confusion
- Recover
- Heal Bell
- Safeguard
 
 
#pk3archive

This Palkia is obtained by using the Spatial Extension, which can be unlocked after capturing Landorus by starting the Dream Radar game with a Pokémon Pearl game cartridge loaded in the 3DS system.
PID 4169292855 Nickname Palkia Gender Genderless Level 5 Nature Brave OT PPorg SID 13453 Location Dream Radar Ball Dream Ball__ Moves DragonBreath Scary Face --- ---

This Banette was obtained through using a single-use serial number found in the October issue of Famitsu magazine.
PID 66889830 Nickname ジュペッタ Gender Female Level 37 Nature Gentle OT ＰＰｏｒｇ SID 51594 Location Entree Forest Ball Dream Ball Moves Faint Attack Hex Shadow Ball Cotton Guard

Species   Volcanion   Nickname   (default, save lang)   OT   ネーベル   TID   04166   Distribution   Serial Code   Location   Pokémon Movie 16   Dates   Apr 16 to Sep 30, 2016    PID   Cannot Be Shiny   Games   JP 3DS: XYORAS    Lv. 70      Nature   Random   Ability   Water Absorb (1)   Item   Rage Candy Bar 
Wishing   Moves   (ITALIC means Relearnable)   Steam Eruption   Overheat   Hydro Pump   Mist   WC ID 161: 「ボルケニオン　プレゼント」's receiving text  0x04 Thank you for coming to see the 2016 Pokémon Movie! Please pick up your gift from the delivery girl in any Pokémon Center. ボルケニオン　プレゼント ことしの　えいがの　しゅやくポケモン
ばくねつの　ボルケニオンを　プレゼント！
スチームバーストで　ぶっとばせ！

One of the legendary beasts that roams Johto. Legend has it, that it's presence can instantly purify filthy, murky water.
In Pokémon HeartGold & SoulSilver, Suicune will traverse across Johto and Kanto, before finally allowing the player to battle with it.
If defeated previously, it will respawn at Burned Tower after the player defeats the Elite Four again.

This event is to commemorate the TCG: Shiny Tapu Koko-GX Box that is released on 14th of July, 2017.
 
 Species   Tapu Koko   Nickname   (default, save lang)   OT   Mele Mele   TID   170714   Distribution   Online Wi-Fi   Location   a lovely place   Dates   Jul 14 to Aug 14, 2017   PID   Shiny PID   Games   EU: SM    Lv. 60      Nature   Timid    Ability   Electric Surge (1)   Item   Electric Seed   Bundled Item   None 
Classic   Moves   (ITALIC means Relearnable)   Nature's Madness   Discharge   Agility   Electro Ball   WC ID 613: 「Un potente Tapu Koko cromatico!」's receiving text  0x2C Thank you for playing Pokémon! Please pick up your gift from the deliveryman in any Pokémon Center. Un potente Tapu Koko cromatico! Domina le sfide grazie a questo Pokémon
dall'aspetto e dalla potenza elettrizzanti!
Appena entra in campo, Tapu Koko
genera un Campo Elettrico con Elettrogenesi,
per poi aumentare la sua Difesa grazie
a un Elettroseme!

In 2012, @HaxAras was shiny hunting for Clefairy, and ended up storing the non-shiny Clefairy into his Pokemon Box,
which ended up helping to unlock the various eggs in Pokemon Box.

Thanks @HaxAras and @InsaneNutter!
 
Egg:
EGG (Pichu) (M)
IVs: 5 HP / 11 Atk / 8 Def / 22 SpA / 8 SpD / 10 Spe
Ability: Static
Level: 5
Careful Nature
- Thunder Shock
- Charm
- Surf

Hatched:
PICHU (Pichu) (M)
IVs: 5 HP / 11 Atk / 8 Def / 22 SpA / 8 SpD / 10 Spe
Ability: Static
Level: 5
Careful Nature
- Thunder Shock
- Charm
- Surf

Species   Diancie   Nickname   (default, save lang)   OT   올스타   TID   08136   Distribution   Infrared   Location   a Pokémon event   Dates   Aug 13 to Aug 14, 2016   PID   Shiny PID   Games   All Regions 3DS: XYORAS                                                               Lv. 50    Nature   Random   Ability   Clear Body (1)   Item   Normal Gem   Card Per Save   Only One Allowed    Moves   (ITALIC means Relearnable)   Diamond Storm   Moonblast   Reflect   Return   WC ID 1071: 「색이 다른 디안시 선물」's receiving text 0x2E Thank you for participating in a Pokémon Video Game event! Please pick up your gift from the delivery girl in any Pokémon Center.

Event 색이 다른 디안시 선물 포켓몬 이벤트에 오신 여러분에게
색이 다른 디안시를 선물합니다.
메가진화로도 진화시켜보세요! Format Ver.1.0.6-2, Post Updated Date:20180412_0716

Species   Gardevoir   Nickname   (default, save lang)   OT   XY&Z   TID   09206   Distribution   Serial Code   Location   a lovely place   Dates   Sep 20 to Nov 15, 2016   PID   Cannot Be Shiny   Games   KO 3DS: XYORAS    Lv. 100      Nature   Random   Ability   Synchronize (1)   Item   Gardevoirite 
Classic   Moves   (ITALIC means Relearnable)   Dazzling Gleam   Moonblast   Stored Power   Calm Mind   WC ID 1072: 「포켓몬스터 새로운 에피소드 방송기념」's receiving text  0x34 Thank you for watching the Pokémon animation! Please pick up your gift from the delivery girl in any Pokémon Center. 포켓몬스터 새로운 에피소드 방송기념 「포켓몬스터 XY&Z」의 새로운 에피소드
TV방송을 기념해서 가디안나이트를 지닌
가디안을 선물합니다!

This event was distributed to players with a Korean 3DS via a common password (serial code) ALOLASTEW762,
that was shown on the episode that aired on the Animax channel, on 19th September 2017, 18:00 KST.
 
 Species   Steenee   Nickname   (default, save lang)   OT   마오   TID   170919   Distribution   Serial Code   Location   the Pokémon animated show   Dates   19 Sep 2017 to ?   PID   Cannot Be Shiny   Games   KO 3DS: SM    Lv. 20     Met Lv. 18                                                                  Nature   Naive   Ability   Leaf Guard (1)   Item   Yellow Nectar   Bundled Item   None 

Classic   Moves   (ITALIC means Relearnable)   Magical Leaf   Double Slap   Sweet Scent   (None)   WC ID 1117: 「마오의 달무리나 선물」's receiving text 0x35 Thank you for watching the Pokémon animation! Please pick up your gift from the deliveryman in any Pokémon Center. 마오의 달무리나 선물 아이나식당의 천진난만한
마스코트 포켓몬
마오의 달무리나를 선물합니다!
애니메이션에서의 활약을
앞으로도 기대해주세요! Format Ver.1.0.5-3, Post Updated Date:20170919_1920

This Pokemon was distributed at the at Pokemon Pop-up store at Lotte Department Store Cheongryangri Branch 8 Culture Hall in South Korea,
which also is concurrently holding the Korean Autumn League.
It also ties in with Halloween, hence for all the Ghost type-related merchandise.
 
 Species   Mimikyu (Disguised)   Nickname   (default, save lang)   OT   포켓몬스토어   TID   171007   Distribution   Infrared   Location   a lovely place   Dates   Oct 07 to Oct 08, 2017   PID   Shiny PID   Games   All Regions 3DS: SM    Lv. 10                                                                  Nature   Random   Ability   Disguise (1)   Item   Rare Candy   Bundled Item   None   Card Per Save   Only One Allowed 

Classic   Moves   (ITALIC means Relearnable)   Astonish   Play Rough   Copycat   Substitute   WC ID 1120: 「색이 다른 따라큐 선물」's receiving text 0x2B Thank you for coming to the Pokémon event! Please pick up your gift from the deliveryman in any Pokémon Center. 색이 다른 따라큐 선물 다가오는 할로윈을 맞이해서
포켓몬 스토어에
희귀한 색이 다른 따라큐가
놀러 왔습니다!
친구가 되어주세요! Format Ver.1.0.5-4, Post Updated Date:20171018_0128

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.

The Nintendo Network redemption (EU 3DS) runs from June 01 to 22, 2018.
The Serial Code cards (US 3DS) can be obtained at GameStop stores between June 01 to 24, 2018.
The end date for the serial code redemption is not known at this point.
This marks the first time Zygarde being able to be obtained shiny.
   Species   Zygarde   Nickname   (default, save lang)   OT   2018 Legends   TID   060218   Distribution   (Various)   Location   a lovely place   Dates   (Various)   PID   Shiny PID   Games   SM                                                                Lv. 60    Nature   Random   Ability   Aura Break (1)   Item   None   Bundled Item   None   Card Per Save   Only One Allowed    Moves   (ITALIC means Relearnable)   Land's Wrath   Glare   Safeguard   Dragon Breath   WC ID 651: 「Dazzling Shiny Zygarde!」's receiving text 0x2C Thank you for playing Pokémon! Please pick up your gift from the deliveryman in any Pokémon Center.

Classic Dazzling Shiny Zygarde! Behold the amazing Legendary Pokémon
Zygarde! Amaze your opponents with
a rare Shiny version of this
incredible Pokémon! Format Ver.1.0.6-2, Post Updated Date:20180601_0232
   Species   Zygarde   Nickname   (default, save lang)   OT   2018 Legends   TID   060218   Distribution   (Various)   Location   a lovely place   Dates   (Various)   PID   Shiny PID   Games   USUM                                                                Lv. 100    Nature   Random   Ability   Aura Break (1)   Item   Gold Bottle Cap   Bundled Item   None   Card Per Save   Only One Allowed    Moves   (ITALIC means Relearnable)   Thousand Arrows   Outrage   Extreme Speed   Dragon Dance   WC ID 651: 「Dazzling Shiny Zygarde!」's receiving text 0x2C Thank you for playing Pokémon! Please pick up your gift from the deliveryman in any Pokémon Center.

Classic Dazzling Shiny Zygarde! Behold the amazing Legendary Pokémon
Zygarde! Amaze your opponents with
a rare Shiny version of this
incredible Pokémon! Format Ver.1.0.6-2, Post Updated Date:20180601_0233

As part of a campaign to promote Pokémon Ultra Sun & Ultra Moon, Pokémon Centers and participating shops in Japan are distributing Pokémon used by the bosses of the villainous teams.
In the after story of Pokémon Ultra Sun & Ultra Moon, these bosses came together to form Team Rainbow Rocket, and the campaign features the Pokémon Centers and participating shops being taken over by Team Rainbow Rocket.
The distribution of the gifts follow a schedule that rotates around every two weeks.
The dates in the summary below shows the dates of the overall campaign.
     Species   Honchkrow   Nickname   (default, save lang)   OT   アカギ   TID   180120   Distribution   Local Wireless   Location   a Pokémon Center   Dates   Jan 20 to Mar 11, 2018   PID   Cannot Be Shiny   Games   All Regions 3DS: USUM                                                                Lv. 65    Nature   Random   Ability   Super Luck (2)   Item   None   Bundled Item   None   Card Per Save   Only One Allowed    Moves   (ITALIC means Relearnable)   Night Slash   Sky Attack   Heat Wave   Icy Wind   WC ID 281: 「Ｒロケットだんアカギの　ドンカラス」's receiving text 0x08 Thank you for coming to the Pokémon Center! Please pick up your gift from the deliveryman in the game.

Classic Ｒロケットだんアカギの　ドンカラス キミたちの　かつやくの　おかげで
わたしの　のぞむせかいに　ちかづいた
ほうびに　ドンカラスを　あたえよう
こんごも　やぼうの　たっせいのために
はげむがいい Format Ver.1.0.6-1, Post Updated Date:20180203_2121