theSLAYER

Distribution Title ポケモンDSラリー2015　ラティオス Wondercard ID 102     PID Cannot Be Shiny Games XYORAS Type Serial Code Dates Aug 1 - Aug 16, 2015 Nickname (default) Gender Male Level 50 Nature Modest Ability Ability 1 OT ７　ＳＰＯＴ TID 711 Location a lovely place Ribbon Wishing , Ball Cherish Ball Held Item Latiosite Moves Dragon Pulse Luster Purge Psychic Heal Pulse Relearn
Moves Dragon Pulse Luster Purge Psychic Heal Pulse Receiving Text 0x35 Thank you for receiving this distribution! Please pick up your gift from the delivery girl in any Pokémon Center.  

This event was distributed via the common password MOKUYO7JI, displayed during the airing of Pokemon XY: Anime in Japan.
This marks the first time Shiny Xerneas was made available, as it was shiny locked in Pokemon X.
Distribution Title アニメ　ＸＹ＆Ｚ　ゼルネアス Wondercard ID 111     PID Shiny PID Games XYORAS Type Serial Code Dates Oct 29, 2015 -
Jan 12, 2016 [MOKUYO7JI] Nickname (default) Gender Genderless Level 100 Nature Random Ability Ability 1 OT ＸＹ＆Ｚ TID 10295 Location the Pokémon cartoon Ribbon Classic , Ball Cherish Ball Held Item None Moves Geomancy Moonblast Aromatherapy Focus Blast Relearn
Moves Geomancy Moonblast Aromatherapy Focus Blast Receiving Text 0x34 Thank you for watching the Pokémon animation! Please pick up your gift from the delivery girl in any Pokémon Center.  

Distribution Title アニメ　ＸＹ＆Ｚ　ジガルデ Wondercard ID 113     PID Cannot Be Shiny Games XYORAS Type Serial Code Dates Nov 12 2015 -
Jan 12 2016 [MEGAMEGA] Nickname (default) Gender Genderless Level 100 Nature Random Ability Ability 1 OT ＸＹ＆Ｚ TID 11125 Location the Pokémon cartoon Ribbon Classic , Ball Cherish Ball Held Item None Moves Land's Wrath Extreme Speed Glare Outrage Relearn
Moves Land's Wrath Extreme Speed Glare Outrage Receiving Text 0x34 Thank you for watching the Pokémon animation! Please pick up your gift from the delivery girl in any Pokémon Center.  

Distribution Title おたんじょうび　おめでとう！ Wondercard ID 121     PID Cannot Be Shiny Games XYORAS Type Infrared Dates Oct 1 2015 - Dec 31 2016 Nickname (default) Gender Male Level 10 Nature Random Ability RND 1, 2 OT ポケセン♪ TID 10015 Location a Pokémon Center Ribbon Birthday , Ball Cherish Ball Held Item None Moves Celebrate Tail Whip Baby-Doll Eyes Swift Relearn
Moves Celebrate (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.  

Distribution Title ポケモンラボの　チコリータ Wondercard ID 127     PID Cannot Be Shiny Games XYORAS Type Serial Code Dates December 23, 2015 to May 9, 2016 Nickname (default) Gender Random Level 5 Nature Random Ability Ability 1 OT ポケモンラボ TID 12235 Location a Pokémon event Ribbon Event , Ball Cherish Ball Held Item None Moves Tackle Growl (None) (None) Relearn
Moves Tackle Growl (None) (None) Receiving Text 0x3A Thank you for coming to the Pokémon event! Please pick up your gift from the delivery girl in any Pokémon Center. Distribution Text ポケモンけんきゅうじょに
きてくれて　ありがとう！
はかせからの　ミッションに
ちょうせん　してくれた　キミに
チコリータを　プレゼントするぞ！
たいせつに　そだててね！  

Distribution Title ポケモンラボの　ヒノアラシ Wondercard ID 128     PID Cannot Be Shiny Games XYORAS Type Serial Code Dates December 23, 2015 to May 9, 2016 Nickname (default) Gender Random Level 5 Nature Random Ability Ability 1 OT ポケモンラボ TID 12235 Location a Pokémon event Ribbon Event , Ball Cherish Ball Held Item None Moves Tackle Leer (None) (None) Relearn
Moves Tackle Leer (None) (None) Receiving Text 0x3A Thank you for coming to the Pokémon event! Please pick up your gift from the delivery girl in any Pokémon Center. Distribution Text ポケモンけんきゅうじょに
きてくれて　ありがとう！
はかせからの　ミッションに
ちょうせん　してくれた　キミに
ヒノアラシを　プレゼントするぞ！
たいせつに　そだててね！  

Distribution Title ポケモンラボの　ワニノコ Wondercard ID 129     PID Cannot Be Shiny Games XYORAS Type Serial Code Dates December 23, 2015 to May 9, 2016 Nickname (default) Gender Random Level 5 Nature Random Ability Ability 1 OT ポケモンラボ TID 12235 Location a Pokémon event Ribbon Event , Ball Cherish Ball Held Item None Moves Scratch Leer (None) (None) Relearn
Moves Scratch Leer (None) (None) Receiving Text 0x3A Thank you for coming to the Pokémon event! Please pick up your gift from the delivery girl in any Pokémon Center. Distribution Text ポケモンけんきゅうじょに
きてくれて　ありがとう！
はかせからの　ミッションに
ちょうせん　してくれた　キミに
ワニノコを　プレゼントするぞ！
たいせつに　そだててね！  

Distribution Title ポケモンスクラップ2016　ふしぎなアメ Wondercard ID 151     Games XYORAS Type Serial Code Distribution Date March 1 to August 31, 2016 Item Rare Candy Quantity x5 Receiving Text 0x35 Thank you for receiving this distribution! Please pick up your gift from the delivery girl in any Pokémon Center. Distribution Text ポケモンスクラップを　８まい
あつめた　ごほうびに
ふしぎなアメを　５コ　プレゼント！

After players complete the puzzle at the Sealed Chamber, the entrances to Desert Ruins, Island Cave and Ancient Tomb will become unsealed.
After entering the chamber, another puzzle will come between the player and the golem residing within.
In order to gain access to the rear chamber, the player has to read the Braille on the wall,
then proceed to the center of the room and have a Pokemon in the party use Fly (HM).
     Species   Registeel   Nickname   (default, save lang)   OT   (recipient)   TID   (recipient)   Distribution   In-Game Encounter   Location   Ancient Tomb   Dates   (Various)   PID   Chance of Shiny   Games   ORAS                                                                Lv. 40    Nature   Random   Ability   Clear Body   Item   None    Moves   (ITALIC means Relearnable)   Curse   Ancient Power   Iron Defense   Amnesia
  Format Ver.1.0.6-2, Post Updated Date:20180505_2215

In Pokemon Omega Ruby & Alpha Sapphire, after players complete the puzzle at the Sealed Chamber, the entrances to Desert Ruins, Island Cave and Ancient Tomb will become unsealed.

In order to encounter Regigigas, the player has to bring Regirock, Registeel and Regice to the Island Cave, in daytime.
Additionally, the Regice has to be nicknamed, and must carry an frozen-affiliated item, namely CasteliaCone, Snowball, or Never-Melt Ice.
     Species   Regigigas   Nickname   (default, save lang)   OT   (recipient)   TID   (recipient)   Distribution   In-Game Encounter   Location   Island Cave   Dates   (Various)   PID   Chance of Shiny   Games   ORAS                                                                Lv. 50    Nature   Random   Ability   Slow Start   Item   None    Moves   (ITALIC means Relearnable)   Foresight   Revenge   Wide Guard   Zen Headbutt
  Format Ver.1.0.6-2, Post Updated Date:20180505_2221

Species   Azelf   Nickname   (default, save lang)   OT   (recipient)   TID   (recipient)   Distribution   In-Game Encounter   Location   Nameless Cavern   Dates   (Various)   PID   Chance of Shiny   Games   ORAS                                                                Lv. 50    Nature   Random   Ability   Levitate   Item   None    Moves   (ITALIC means Relearnable)   Uproar   Future Sight   Nasty Plot   Extrasensory
  Format Ver.1.0.6-2, Post Updated Date:20180506_0534

Distribution Title ポケモンスクラップ2016　マスターボール Wondercard ID 152     Games XYORAS Type Serial Code Distribution Date March 1 to August 31, 2016 Item Master Ball Quantity x1 Receiving Text 0x35 Thank you for receiving this distribution! Please pick up your gift from the delivery girl in any Pokémon Center. Distribution Text ポケモンスクラップを　２０まい
あつめた　ごほうびに
マスターボールを　プレゼント！

Species   Mesprit   Nickname   (default, save lang)   OT   (recipient)   TID   (recipient)   Distribution   In-Game Encounter   Location   Nameless Cavern   Dates   (Various)   PID   Chance of Shiny   Games   ORAS                                                                Lv. 50    Nature   Random   Ability   Levitate   Item   None    Moves   (ITALIC means Relearnable)   Lucky Chant   Future Sight   Charm   Extrasensory
  Format Ver.1.0.6-2, Post Updated Date:20180506_0536

Species   Uxie   Nickname   (default, save lang)   OT   (recipient)   TID   (recipient)   Distribution   In-Game Encounter   Location   Nameless Cavern   Dates   (Various Dates)   PID   Chance of Shiny   Games   ORAS                                                                Lv. 50    Nature   Random   Ability   Levitate   Item   None    Moves   (ITALIC means Relearnable)   Yawn   Future Sight   Amnesia   Extrasensory
  Format Ver.1.0.6-2, Post Updated Date:20180506_0538

This Therian Forme Landorus is obtained through using the Eureka Extension γ, which is unlocked after capturing Thundurus and collecting 1500 additional Dream Orbs.
The Reveal Glass can be obtained by bringing this Landorus to the Abundant Shrine.
If the Reveal Glass is used to change it to its Incarnate Forme, it will know its Hidden Ability, Sheer Force.
 
 Species   Landorus (Therian)   Nickname   Landorus (ENG)   OT   PPorg   TID   13453   Distribution   Dream Radar   Location   Pokémon Dream Radar   Dates   (Any Transfer Date)   PID   Cannot Be Shiny   Games   B2W2    Lv. 5      Nature   Hardy    Ability   Intimidate (HA)   Item   None      Moves       Block   Mud Shot   Rock Tomb   (None)

Distribution Title ポケモンスクラップ2016　げんきのかたまり Wondercard ID 157     Games XYORAS Type Serial Code Distribution Date April 28 - August 31, 2016 Item Max Revive Quantity x5 Receiving Text 0x35 Thank you for receiving this distribution! Please pick up your gift from the delivery girl in any Pokémon Center. Distribution Text ポケモンスクラップを　８まい
あつめた　ごほうびに
げんきのかたまりを　５コ　プレゼント！

A rudimentary viewer and editor program for GP1 files.
Supports drag and drop (just drag the GP1 onto the program).

Has a function to store location data, as well as use stored location data.
The bundled location.txt needs to be in the same folder as the program, for it to work.
Also has in-built CP calculator, based on IVs and level.
Note: the CP shown, is based on PGo CP calculation, which is how Go Park works.
Initial encounter, it will show PGo details. Once captured, the CP gets rerolled to Let's Go CP.

If you're rehosting it, please link/source THIS page.
Source Code: https://github.com/PP-theSLAYER/gp1editor
(I gotta warn you, it's horrible code)

Note from 13th December, 2018:
On this day, some of the stats of certain Pokemon has been changed.
If I'm not mistaken, unlike the forced stat change enforced during Let's Go's release, these only kick in if:
(1) you evolved into that Pokemon after the change or
(2) you powered up the particular species after the change or
(3) you freshly captured that species after the change or
(4) you received the Pokemon from trade after the change.
Meaning if you already had the creature before the change, it's CP and stats will remain unchanged on Pokemon Go, until you performed one of the points above.
Do note that these changes could be enforced in the future, even if the actions specified above wasn't performed.
[Confirmed on my end; I transferred 2 Meltan on 13-Dec, one captured before and one captured after the change.
The older one uses old CP calculation, while newer one uses new calculation. See image in screenshots section]

 In any case, these are the Pokemon affected by the change:
 

Distribution Title ポケモンスクラップ2016　マスターボール Wondercard ID 158     Games XYORAS Type Serial Code Distribution Date April 28 - August 31, 2016 Item Master Ball Quantity x1 Receiving Text 0x35 Thank you for receiving this distribution! Please pick up your gift from the delivery girl in any Pokémon Center. Distribution Text ポケモンスクラップを　２０まい
あつめた　ごほうびに
マスターボールを　プレゼント！！

Credits to Kirzi for this hard to obtain Birthday Pokemon.
Distribution Title おたんじょうび　おめでとう！ Wondercard ID 184     PID Cannot Be Shiny Games XYORAS Type Local Wi-Fi Dates Oct 1 -
Dec 31, 2016 Species Eevee Nickname (default) Gender Male Level 10 Nature Random Ability Run Away (1) or Adaptability (2) OT ポケセン♪ TID 10016 Location a Pokémon Center Ribbon Birthday , Ball Cherish Ball Held Item None Moves Celebrate Tail Whip Baby-Doll Eyes Swift Relearn
Moves Celebrate (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.  

This Arceus was distributed to HKTW players who attended the Movie Hoopa and the Clash of Ages via Serial code.
Distribution Title アルセウス　プレゼント Wondercard ID 123 PID Shiny Locked PID Games XYORAS Type Serial Code Dates Nov 20 - Dec 17,
2015 Nickname (default) Gender Genderless Level 100 Nature Random Ability Ability 1 OT デセルシティ TID 3075 Location Pokémon Movie 15 Ribbon Wishing , Ball Cherish Ball Held Item Silk Scarf Moves Judgment Blast Burn Hydro Cannon Earth Power Relearn
Moves Blast Burn Hydro Cannon (None) (None) Receiving Text 0x03 Thank you for coming to see the 2015 Pokémon Movie! Please pick up your gift from the delivery girl in any Pokémon Center.

Distribution Title ウチダアツトの　ピカチュウ Wondercard ID 33     PID Cannot Be Shiny     Games XY Type Local Wi-Fi Dates Jun 15 2014 Species Pikachu Nickname (default) Gender Male Level 22 Nature Random Ability Static (1) OT ウチダアツト TID 22 Location an event site Ribbon Classic Ball Cherish Ball Held Item Light Ball Moves Quick Attack Electro Ball Double Team Mega Kick Relearn
Moves Mega Kick (None) (None) (None) Receiving Text 0x50 Thank you for coming to the event! Please pick up your gift from the delivery girl in any Pokémon Center.

Distribution Title トレッタに　もぐりこんだ　ロトム Wondercard ID 45     PID Cannot Be Shiny     Games XY Type Local Wi-Fi Dates Oct 15 - Dec 3, 2014 Species Rotom
(Normal) Nickname (default) Gender Genderless Level 10 Nature Quirky Ability Levitate (1) OT トレッタ TID 9254 Location a lovely place Ribbon Classic Ball Cherish Ball Held Item None Moves Shock Wave Astonish Trick Thunder Wave Relearn
Moves (None) (None) (None) (None) Receiving Text 0x2B Thank you for playing Pokémon! Please pick up your gift from the delivery girl in any Pokémon Center.

Distribution Title いろちがいのレックウザ　プレゼント Wondercard ID 140     PID Shiny PID     Games ORAS Type Local Wi-Fi Dates Feb 1 to 29, 2016 Species Rayquaza Nickname (default) Gender Genderless Level 70 Nature Random Ability Air Lock (1) OT コロコロ TID 3145 Location an event site Ribbon Event Ball Cherish Ball Held Item None Moves Dragon Pulse Twister Thunder Extreme Speed Relearn
Moves (None) (None) (None) (None) Receiving Text 0x2B Thank you for playing Pokémon! Please pick up your gift from the delivery girl in any Pokémon Center.

Distribution Title フーパ　プレゼント Wondercard ID 124     PID Cannot Be Shiny     Games XYORAS Type Serial Code Dates November 3 to
30, 2015 Species Hoopa Nickname (default) Gender Genderless Level 50 Nature Random Ability Magician (1) OT Mighty TID 7185 Location Pokémon Movie 15 Ribbon Wishing Ball Cherish Ball Held Item Focus Sash Moves Hyperspace Hole Psychic Astonish Nasty Plot Relearn
Moves (None) (None) (None) (None) Receiving Text 0x03 Thank you for coming to see the 2015 Pokémon Movie! Please pick up your gift from the delivery girl in any Pokémon Center.

Distribution Title ボールのもようの　ビビヨン Wondercard ID 36     PID Cannot Be Shiny     Games XY Type Local Wi-Fi Dates Aug 1 -31 2014 Species Vivillon
(Poke Ball Forme) Nickname (default) Gender Male/Female Level 12 Nature Random Ability Shield Dust (1) or Compound Eyes (2) OT ポケセン TID 8014 Location a Pokémon Center Ribbon Classic Ball Poke Ball Held Item None Moves Stun Spore Gust Light Screen Struggle Bug Relearn
Moves (None) (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.