theSLAYER

In the games Pokémon FireRed & LeafGreen, a pair of Snorlax will stop the player from being able to reach Fuchsia City,
until the player gains possession of the key item Poké Flute, that is able to awaken sleeping Pokémon.

In the games Pokémon FireRed & LeafGreen, a terrified Silph Co. employee will give the player a Lapras, as thanks for saving Silph Co. from Team Rocket.

In the games Pokémon FireRed & LeafGreen, part of the side-quest in Sevii Islands requires the player to find Lostelle,
who apparently wandered too far into the Berry Forest, and is now pestered by a Hypno.

In the game Pokémon FireRed & LeafGreen, Mewtwo can be encountered in the Cerulean Cave after players complete the Sevii Island's quest that involves the delivery of the key item Sapphire to Celio.
The Sevee Island quest can only be done after the player defeats the Elite Four, and obtains the National Dex
(which involves having 60 species registered in the Kanto Dex).

In the game Pokémon Ruby, Latios roams Hoenn after the player's first entry into the Hall of Fame and watches the TV broadcast in the player's living room.

In the game Pokémon Emerald, the same conditions as above apply, with an additional condition:
the player must choose Blue after watching the TV broadcast.
Because of the Roamers IV Glitch, roamers in Gen III will have weak IVs (besides Hit Points).
As a result, the Hidden Power of roamer will always be Fighting Type.
Pokémon Emerald isn't affected by the glitch, however.

In the games Pokémon FireRed & LeafGreen, after the player delivers the key item Sapphire to Celio,
and if the player chose Bulbasaur as their starter, Entei will begin roaming throughout Kanto.
Because of the Roamers IV Glitch, roamers in Gen III will have weak IVs (besides Hit Points).
As a result, the Hidden Power of roamer will always be Fighting Type.

In the games Pokémon FireRed & LeafGreen, after the player delivers the key item Sapphire to Celio,
and if the player chose Squirtle as their starter, Raikou will begin roaming throughout Kanto.
Because of the Roamers IV Glitch, roamers in Gen III will have weak IVs (besides Hit Points).
As a result, the Hidden Power of roamer will always be Fighting Type.

This tool is effectively an RNG reporter for XD Colo Pokemon, and the dropdown box allows users to search for specific species.
Original Release: https://github.com/ijuintekka/Eligor/releases

In the games Pokémon Diamond, Pearl & Platinum, the player obtains an egg from Riley after they reach the end of Iron Island together.
As per any egg gift, it has a chance of being shiny when traded to another trainer with the correct TID/SID combo.

In the games Pokémon Diamond & Pearl, the player obtains an egg when the player interacts with the Hiker near the gate to the right of Hearthome City.
As per any egg gift, it has a chance of being shiny when traded to another trainer with the correct TID/SID combo.

In the games Pokémon HeartGold & SoulSilver, when the player interacts with Primo in the Violet City's Pokémon Center,
and gives the correct passwords, Primo will give the player an egg.

Officially, the passwords were only given for Japanese players via the Daisuki Club
(which the service for the passwords has since been defunct).
However, players can use external codeword generator to unlock the exclusive content.
As per any egg gift, it has a chance of being shiny when traded to another trainer with the correct TID/SID combo.

In the games Pokémon HeartGold & SoulSilver, when the player interacts with Primo in the Violet City's Pokémon Center,
and gives the correct passwords, Primo will give the player an egg.

Officially, the passwords were only given for Japanese players via the Daisuki Club
(which the service for the passwords has since been defunct).
However, players can use external codeword generator to unlock the exclusive content.
As per any egg gift, it has a chance of being shiny when traded to another trainer with the correct TID/SID combo.

In the games Pokémon HeartGold & SoulSilver, when the player interacts with Primo in the Violet City's Pokémon Center,
and gives the correct passwords, Primo will give the player an egg.

Officially, the passwords were only given for Japanese players via the Daisuki Club
(which the service for the passwords has since been defunct).
However, players can use external codeword generator to unlock the exclusive content.
As per any egg gift, it has a chance of being shiny when traded to another trainer with the correct TID/SID combo.

This event was given away to commemorate The Year of Legendary Pokémon via Serial code for US 3DS, and Nintendo Network for 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 gift can only received on Pokémon Sun & Ultra Sun, while it is normally encountered at the Ultra Space Wilds of Pokémon Ultra Moon.
Serial Codes were distributed via Best Buy and other participating stores, between Sep 02 to Sep 29, 2018.
Nintendo Network distribution for EU region was done between Sep 01 to Sep 23, 2018.
     Species   Latias   Nickname   (default, save lang)   OT   Leyendas2018   TID   090118   Distribution   (Various)   Location   a lovely place   Dates   (Various)   PID   Cannot Be Shiny   Games   US & EU 3DS: S                                                                Lv. 60    Nature   Random   Ability   Levitate (1)   Item   None   Bundled Item   None   Card Per Save   Only One Allowed    Moves   (ITALIC means Relearnable)   Mist Ball   Dragon Pulse   Psycho Shift   Wish   WC ID 654: 「¡Un Latias veloz y ágil!」's receiving text 0x2C Thank you for playing Pokémon! Please pick up your gift from the deliveryman in any Pokémon Center.

Classic ¡Un Latias veloz y ágil! El Pokémon legendario de tipo Dragón y Psíquico
Latias desciende al terreno de combate y utiliza
movimientos asombrosos, como su característico
Bola Neblina. Format Ver.1.0.6-3, Post Updated Date:20180902_0034
     Species   Latias   Nickname   (default, save lang)   OT   Leyendas2018   TID   090118   Distribution   (Various)   Location   a lovely place   Dates   (Various)   PID   Cannot Be Shiny   Games   US & EU 3DS: US                                                                Lv. 100    Nature   Random   Ability   Levitate (1)   Item   Gold Bottle Cap   Bundled Item   None   Card Per Save   Only One Allowed    Moves   (ITALIC means Relearnable)   Mist Ball   Psychic   Draco Meteor   Tailwind   WC ID 654: 「¡Un Latias veloz y ágil!」's receiving text 0x2C Thank you for playing Pokémon! Please pick up your gift from the deliveryman in any Pokémon Center.

Classic ¡Un Latias veloz y ágil! El Pokémon legendario de tipo Dragón y Psíquico
Latias desciende al terreno de combate y utiliza
movimientos asombrosos, como su característico
Bola Neblina. Format Ver.1.0.6-3, Post Updated Date:20180902_0034

This page hosts the starter Eevee obtained during the narrative of Pokémon XD: Gale of Darkness.
The PID of the Eevee is determined a few frames after the determination of the TID and SID of the trainer, not unlike the starters in Colosseum (read more about that here; XD/Colo PID search can be done with this tool).
As a result, not every TID/SID and PID combo will be legitimately shiny.
More Colosseum and XD Pokémon can be found at this page.

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

This page hosts the files for the Standard and Shiny variant of Gligar,
which can be found in the Cave Poké Spot of Pokémon XD: Gale of Darkness.
More Colosseum and XD Pokémon can be found at this page.

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

In the games Pokémon Emerald, after Hoenn Dex is completed, the player gets to choose a starter Chikorita, Cyndaquil or Totodile from Professor Birch.

In the games Pokémon Emerald, after Hoenn Dex is completed, the player gets to choose a starter Chikorita, Cyndaquil or Totodile from Professor Birch.

In the games Pokémon Emerald, after Hoenn Dex is completed, the player gets to choose a starter Chikorita, Cyndaquil or Totodile from Professor Birch.

After clearing the Fighting Dojo in Saffron City, the player would be given a choice to obtain Hitmonlee or Hitmonchan.

After clearing the Fighting Dojo in Saffron City, the player would be given a choice to obtain Hitmonlee or Hitmonchan.

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

In the games Pokémon X & Y, the player gets to choose a starter Chespin, Fennekin or Froakie from your new friends in Aquacorde Town, on behalf of Professor Sycamore.