New Pokémon

Across the history of the franchise, several new , also described in official media as newly discovered Pokémon and never-before-seen Pokémon, have been revealed in various ways before becoming available in the core series . 
Many Pokémon first appeared in the Pokémon animated series, s, or , while others have been teased or unveiled in periodical video presentations, special websites, promotional trailers on , in print publications such as CoroCoro magazine, or in advertisements. New Pokémon have also frequently been before their intended debut. Additionally, some Pokémon, often Mythical Pokémon, have been hinted at in the games before their formal reveal or were discoverable in game code or through glitches.
Limited information may be known about a Pokémon before it is obtainable in the games; only a silhouette or brief glimpse of the Pokémon may be shown, or the name or type of the Pokémon may be left unrevealed.
==History==
===Generation I===
Less than two months after the release of in Japan, the first brand new Pokémon species to be revealed was , appearing in the May issue of CoroCoro Comics released in April 1996, thus bringing the . The issue featured a promotion allowing 20 players to send in copies of their games to have Mew added by Nintendo. Mew was later made widely available through s soon after the international release of , which first released in North America on September 28, 1998.
Before its official reveal, Mew was discoverable in the code of the Generation I games, as well as through glitches.
Mew was a little-known secret when Pokémon Red and Green were first released in Japan. Even Nintendo was not initially aware that Shigeki Morimoto had programmed it into the game.Iwata Asks - Pokémon HeartGold Version & SoulSilver Version According to Morimoto, the cartridges for Pokémon Red and Green had about 300 bytes of free space left after the debugging process was complete, and he thought of slotting Mew in as a last-minute addition, even after he was told not to tamper with the games post-debugging. However, Pokémon Red and Green are 373 kilobytes in size and are housed in 512 kilobyte cartridges.The File Size Of Every Core Pokemon Game - The Gamer.https://datacrystal.romhacking.net/wiki/Pokémon_Red_and_Blue In an interview with Game Freak and Creatures, Inc. in Nintendo Power issue 134, Morimoto revealed that he created Mew two weeks before game development was finished.Nintendo Power Vol. 134, July 2000, p.78-79 (excerpt)
===Generation II===
An unidentified Pokémon appeared in the first episode of Pokémon the Series titled Pokémon - I Choose You!, first broadcast in Japan on April 1, 1997, and in the United States on September 8, 1998. It was seen flying over a rainbow by on his first day as a Pokémon Trainer. The Pokémon, later revealed to be named , was first revealed in the August 1996 issue of CoroCoro magazine.https://www.zoidsland.com/1rebyu-/koro96-8.html It was the first Generation II Pokémon to appear in any Pokémon media, and was the first sign that the franchise would expand beyond the . 
A month later, , , and were revealed in the May 1997 issue of CoroCoro.https://www.zoidsland.com/1rebyu-/koro97-5b.html
In Attack of the Prehistoric Pokémon, which first aired in Japan on May 28, 1998 and in the United States on February 27, 1999, Ash found a mysterious Pokémon Egg. In Who Gets to Keep Togepi?, which first aired in Japan on June 25, 1998, and in the United States on March 27, 1999, the Egg hatched into a never-before-seen Pokémon named , marking the second appearance of a Generation II Pokémon in the animated series. Due to the effects of the "Pokémon Shock" incident, this episode was delayed from its original airdate in March 1998, which may have been intended to coincide with the release of , originally scheduled to release the same month.
Initially revealed in July 1998 in CoroCoro, and would later appear in the Pikachu short Pikachu's Vacation shown alongside the first Pokémon movie, which debuted in Japanese theaters on July 18, 1998, and in North American theaters on November 10, 1999. Donphan also made its first major appearance in the beginning of Mewtwo Strikes Back, used by Raymond in a against Ash. 
First seen as a silhouette in the December 1998 issue of CoroCoro, was first fully shown off in the May 1999 issue alongside , , and . A glimpse of Elekid's prongs would later appear in a sketch by in the episode Misty Meets Her Match, which aired on July 1, 1999 in Japan, and September 9, 2000 in the United States. was revealed in the June issue of CoroCoro, and later appeared with Hoothoot, Elekid, and Bellossom in the Pikachu short Pikachu’s Rescue Adventure shown alongside the second movie, which released in Japanese theaters on July 17, 1999 and North American theaters on July 21, 2000. Lugia and Slowking made their first full appearance in The Power of One, playing major roles in the film. 
Several more Pokémon were revealed in CoroCoro in August, September, and October of 1999. and were revealed in the August issue, and and were revealed in the September issue. In October, the Johto first partner Pokémon, , , and , were revealed, as well as and . 
Episodes taking place in Johto started airing in Japan a month before the release of , in which several Generation II Pokémon appeared before their game debut. Notably, first appeared in Don't Touch That 'dile, first broadcast in Japan on October 14, 1999, with Cyndaquil and Totodile also making their first appearances in the series. Chikorita appeared in the next episode on October 21, and Heracross appeared in the episode after that on October 28.
Finally, and were revealed in the November 1999 issue of CoroCoro, which also featured Suicune.
====Release of Pokémon Gold and Silver====
 released in Japan on November 21, 1999 and in North America on October 15, 2000, bringing along , including all those previously revealed, as well as , which would officially be revealed in the July 2000 issue of CoroCoro magazinehttps://www.zoidsland.com/1rebyu-/koro-00-7.html and made available later through s. Celebi first became available in Nintendo Space World 2000 in Japan.
===Generation III===
The first set of Pokémon to be revealed for Generation III was , , and , revealed on March 7, 2001. Kecleon made its first animated series appearance a few months later in The Kecleon Caper, which aired in Japan on July 5, 2001 and in the United States on August 17, 2002. A couple days after that, Wailmer and Azurill appeared in the tenth Pikachu short, Pikachu's PikaBoo, which aired in Japan on July 7, 2001 and in the United States on March 18, 2003.
, , and were later revealed some time between September 2001 and February 22, 2002. and were then leaked on March 3, 2002 in an image from the eleventh Pikachu short, Camp Pikachu.
The Hoenn first partner Pokémon, , , and , were revealed for Pokémon Breeder mini on March 21, 2002. 
On June 13, 2002, a glimpse of a can be seen in the episode Fangs for Nothin', which aired in Japan on June 13, 2002 and in the United States on June 7, 2003. This Wynaut would been seen more clearly in subsequent episodes as it followed around . 
Latias and Latios were featured in the fifth Pokémon movie, which aired in Japan on July 13, 2002 and in the United States on January 20, 2004. Camp Pikachu also aired alongside the movie, providing the first official appearance of Duskull and Volbeat.
 and were leaked in the August issue of CoroCoro magazine on July 14. Three more Pokémon were revealed ten days later at , with and revealed on July 24, and revealed on July 27. After another couple months passed, was revealed in the September issue of CoroCoro, released on August 17. Blaziken later appeared in the animated series in the episode Pop Goes the Sneasel, which aired in Japan on September 12, 2002 and in the United States on September 16, 2003.
The Legendary Pokémon and were revealed alongside the announcement of on various official Japanese websites on October 4, 2002. A little over a week later, was leaked in the November issue of CoroCoro on October 12, 2002. At the end of the month, was revealed on October 29 in Pokémon Special, a weekly countdown to the release of Pokémon Ruby and Sapphire and the next season of the animated series.
On November 1, 2002, and were leaked in marketing materials. In the following week, and were revealed on November 3, and was revealed on November 6. Lotad and Seedot were previously seen alongside Shroomish, Wailmer, and Zigzagoon in the episode Johto Photo Finish, which aired in Japan on October 31, 2002 and in the United States on October 11, 2003. 
 was revealed at Pokémon Festa 2002 in on November 10. was also revealed on November 10. Days later, the last batch of new Pokémon were leaked in the December issue of CoroCoro. , , , , , and were leaked on November 13, and , , and were leaked the next day on November 14. Airing the same day in Japan, the episode Hoenn Alone featured the first animated series appearances of Wingull and Pelipper and the first full appearance of Sharpedo.
====Release of Pokémon Ruby and Sapphire====
 were released in Japan on November 21, 2002, introducing , including those previously revealed, as well as and . The games released in North America on March 19, 2003.
Jirachi was revealed in 2003 in the context of the sixth Pokémon movie, in which it starred. It first became available in Japan to players who pre-ordered tickets to the movie, with other limited distribution s following throughout the year. Its distribution in the west was altered, as it was included in the Pokémon Colosseum Bonus Disc in the United States and in in Europe and Australia.
In spite of being included in Pokémon Ruby and Sapphire, Deoxys was first made available in . Officially revealed in late 2003 as a leading character in the seventh movie, players were first able to capture Deoxys by use of the AuroraTicket, which provided access to Birth Island, where it appears in-game.
===Generation IV===
The first Generation IV Pokémon to be revealed to the public was , debuting in a magazine scan released on May 14, 2004. Munchlax would later appear in the seventh Pokémon movie, which premiered in Japanese theaters on July 17, 2004 and in the United States on February 15, 2005. Munchlax went on to make many other appearances before the release of the Generation IV games, such as in the games Pokémon Dash, , Pokémon Team Turbo, and Pokémon Mystery Dungeon: Red Rescue Team and Blue Rescue Team. Additionally, a owned by in would first appear in the episode Berry, Berry Interesting, which released in Japan on March 5, 2005 and in the United States on February 11, 2006.
It wasn't until nearly one year after Munchlax's initial reveal, and about five months after the announcement of on October 7, 2004,List of Nintendo DS titles to be released (その他の発売予定タイトル), that the next Pokémon, , would be revealed by TV Tokyo in a trailer for the next movie, broadcast on March 3, 2005. Later that month, silhouettes of three Pokémon began to circulate, which were ultimately unveiled on April 13 in the May issue of CoroCoro magazine, revealing them to be , , and ."Three shadows unveiled." Bulbanews. April 13, 2005. Lucario, Bonsly, Mime Jr., and Weavile would all later appear in the eighth Pokémon movie, which premiered in Japan on July 16, 2005 and released for home video in the United States on September 19, 2006. They also appeared as unlockable statues in Pokémon Mystery Dungeon: Red Rescue Team and Blue Rescue Team, and Bonsly appeared alongside Munchlax in Pokémon XD: Gale of Darkness.
On February 14, 2006, a scan of the March issue of CoroCoro magazine revealed as the Pokémon that hatches from the that appeared in earlier trailers for the next movie."Scan of new Pokémon surfaces." Bulbanews. February 14, 2006. The scan also showed silhouettes of three Pokémon, which were revealed on March 3, along with other details for the upcoming movie, to be , , and ."Three new Pokémon revealed." Bulbanews. March 3, 2006. All four new Pokémon appeared in the ninth movie when it released in Japanese theaters on July 15, 2006, and in the United States on March 23, 2007. A Manaphy Egg also appeared in , which would be able to hatch into Manaphy when sent to Pokémon Diamond and Pearl upon release.
The game mascots for Pokémon Diamond and Pearl, and , were revealed on June 30, 2006, along with , , and , unveiled from a scan of the cover of the upcoming Pokémon Wonderland Vol. 8 magazine set."Pokémon Wonderland 8 cover unveiled." Bulbanews. June 30, 2006. The scan was low resolution, and only the potential names ティアガガ Tiagaga and ルハキア Ruhakia or Luhakia could be made out as the Japanese names of Dialga and Palkia, and other details such as their types were left unknown. The names of the other three Pokémon were not legible.
The Yahoo! Kids Japanese Pokémon site updated on July 15, 2006 with new information on the upcoming games."Further Diamond and Pearl info released." Bulbanews. July 15, 2006. Included on the site were partially obscured silhouettes of four unidentified new Pokémon, as well as a game screenshot featuring a Pokémon resembling , which would later be revealed to be its evolved form, . This Pokémon would later appear in the final episode of , Home is Where the Start Is!, as one of Gary Oak's Pokémon, just two weeks before the release of Pokémon Diamond and Pearl.
 was revealed as the Evolution of in a Japanese demo of Pokémon Diamond and Pearl made available starting July 20, 2006."Roselia's evolved form revealed" Bulbanews. July 20, 2006. A low-quality screenshot from the Japanese demo playable at Japan's Pokémon Jungle Tour on July 21 revealed ."Diamond, Pearl demo reveals another Pokémon." Bulbanews. July 21, 2006.
The Sinnoh first partner Pokémon, , , and , were leaked on August 5, 2006 in the September issue of CoroCoro."September 2006 CoroCoro scans leaked to Internet." Bulbanews. August 5, 2006. 
On August 11, 2006, an update to Pokémon Garden on the Japanese Yahoo! Kids game site allowed visitors to discover silhouettes of two new Pokémon, and hints at two additional ones."More news from the Game Freak development room." Bulbanews. August 11, 2006. Later that day, one of the silhouettes was revealed to be ."Silhouetted Pokémon unveiled in screenshot." Bulbanews. August 11, 2006. 
K-net, a Japanese shopping site posted a picture of the 2007 Pokémon Character Daily Calendar on September 1, 2006."Two new Pokémon revealed." Bulbanews. September 1, 2006. In addition to previously revealed Pokémon, the cover featured two new species, one appearing to be a pre-evolved form of , and the other being a new cat Pokémon. The names of both Pokémon were not revealed, but would later be identified as and .
Several Pokémon were leaked on September 12, 2006 in the October issue of CoroCoro, including , , , , , , and ."October CoroCoro scans uploaded to Internet." Bulbanews. September 12, 2006. Dialga and Palkia's types were also revealed to be / and /, respectively. Shinx was previously seen as one of the two silhouetted Pokémon from the Pokémon Garden update a month before. Budew, a pre-Evolution of Roselia, was also previously teased in the same update. The final Pokémon to be revealed before the release of Pokémon Diamond and Pearl was , revealed on September 25 through a magazine scan.
====Release of Pokémon Diamond and Pearl====
The release of in Japan on September 28, 2006 brought , including all previously revealed species. The games later came to North America on April 22, 2007.
The Mythical Pokémon Darkrai, Shaymin, and Arceus, while discoverable in the games' code, would not be officially revealed until some time after the release of Pokémon Diamond and Pearl. was officially revealed in February 2007 and later starred in the tenth movie, released in Japan on December 21, 2007, and in the United States on February 24, 2008. was revealed in February 2008, to be featured in the eleventh movie. In early June of the same year, Shaymin's was revealed. Both forms appeared in the movie, which premiered in Japan on July 19, 2008 and in the United States on February 13, 2009. was not officially recognized until February 14, 2009, the year of its debut movie. Arceus was officially revealed to international audiences on August 3, 2009. 
Darkrai and Shaymin were previously accessible via a glitch in the early Japanese versions of Pokémon Diamond and Pearl, well before their official debut. An event for obtaining Arceus was also coded into the games, but the item for triggering the event, the Azure Flute, was never officially distributed.
===Generation V===
 
During the airing of Pokémon Sunday on February 6, 2010, a silhouette of a new Pokémon set to star in the thirteenth Pokémon movie marked the beginnings of Generation V."First Gen V Pokémon revealed in Pokémon Sunday." Bulbanews. February 6, 2010. Four days later, on February 10, the March issue of CoroCoro magazine unveiled the Pokémon, revealing it to be , with the issue also revealing its pre-evolved form, ."March 2010 CoroCoro features new Pokémon, Ranger game." Bulbanews. February 10, 2010. Zoroark and Zorua later appeared in the thirteenth movie when it premiered in Japan on July 10, 2010, and in the United States on February 5, 2011.
Another airing of Pokémon Sunday, broadcast three months later on May 8, 2010, released additional teaser silhouettes, this time of the first partner Pokémon for ."Black, White Starter Pokémon silhouettes unveiled on Pokémon Sunday." Bulbanews. May 8, 2010. Four days later, on May 12, a scan of the June issue of CoroCoro unveiled the Unova first partner Pokémon, , , and ."CoroCoro scan reveals Generation V information." Bulbanews. May 12, 2010.
An update on May 28, 2010 to the official Japanese and English Pokémon websites for Pokémon Black and White revealed the Legendary Pokémon and , which would be featured on the box art of Pokémon Black and Pokémon White, respectively."Black and White legendaries revealed." Bulbanews. May 28, 2010.
On June 11, 2010, a leak of the July issue of CoroCoro revealed , , , , , , and ."More Black and White information surfacing." Bulbanews. June 11, 2010. Additionally, more information about Reshiram and Zekrom became available, including their typing.
In the following weeks, several more Pokémon were revealed, initially without confirmed names or any other major details. On June 27, 2010, a gameplay trailer shown on the Japanese TV show Oha Suta revealed several new Pokémon."New Pokémon, gameplay shown on Oha Suta." Bulbanews. June 27, 2010. On July 1, an image of a poster showcasing characters from the upcoming leaked, revealing additional new species."Fourth anime series title revealed." Bulbanews. July 1, 2010. The poster was officially revealed alongside a trailer for the thirteenth movie that aired with DP183 on July 1.
In the first days of July 2010, early screenings of the thirteenth movie revealed new gameplay for the upcoming Generation V games, which included a Pokémon at the time believed to be called ネズミミ Nezumimi."Movie 13, Bandai possibly reveal new Pokémon." Bulbanews. July 5, 2010. A teaser for the fourteenth movie was also shown, providing a glimpse of an unnamed Pokémon with pointy ears. Around the same time, photos from a Chinese retailer revealed toys for Bandai's Kimewaza Pokémon Kids line, depicting two new Pokémon, then rumored to be named ナマクス Namakusu, which closely resembled a Pokémon from the earlier poster, and ネズミドリ Nezumidori. On July 6, an episode of Oha Suta confirmed the name of another Pokémon from the earlier poster, コロモリ Coromori, later learned to be named in English."Oha Suta confirms another Pokémon from anime leak." Bulbanews. July 6, 2010. A stylized Woobat design also appeared on Karl's hat in the thirteenth movie, which premiered in Japanese theaters four days later.
Images circulated on July 9, 2010 from a Japanese demo of Pokémon Black and White showcased ハトーポー Hatōpō, believed to be related to the previously revealed マメパト Mamepato (Pidove)."More new Pokémon seen during demo." Bulbanews. July 9, 2010. A second image contained a heavily obscured Pokémon with a name ending in ネズミ nezumi (mouse). Additionally, two of the Pokémon that had previously been seen in the Oha Suta June 27 trailer, as well as the Pokémon seen on the Best Wishes! character poster and in the retailer photo, were reported to be named ゴチルゼル Gochiruzeru, ランクルス Rankurusu, and キバゴ Kibago, respectively, whose English names would later be revealed as , , and . The Pokémon Axew was previously misidentified by the name ナマクス Namakusu.
A silhouette of a bird Pokémon was shown in an episode of Pokémon Sunday that aired on July 11, 2010, with the Pokémon to be unveiled in the next week's episode."Silhouette of new Pokémon shown on Pokémon Sunday." Bulbanews. July 11, 2010. However, the Pokémon was revealed the next day to be , due to a leak of the August issue of CoroCoro, which also revealed and the Pokémon previously misnamed by fans as ネズミミ Nezumimi, ."More new Pokémon appear." Bulbanews. July 12, 2010. Seen a few days before, Patrat was also the Pokémon heavily obscured in the July 9 screenshot, with its Japanese name now properly being revealed as ミネズミ Minezumi.
An episode of Oha Suta that aired on July 21, 2010 featured a screenshot showing three Pokémon in a Triple Battle, including a new pink-colored fish Pokémon, reported by Filb.de to be named ママンボウ Mamanbō."Oha Suta reveals new Pokémon." Bulbanews. July 21, 2010. The other two Pokémon were previously seen in the June 27 trailer, with one being the previously identified ゴチルゼル Gochiruzeru (Gothitelle) and the other now reported by Filb.de to be named ギガイアス Gigaiasu. The names of these Pokémon however were not visible in the screenshot featured in the episode.
On July 24, 2010, Pokémon Sunday revealed the Mythical Pokémon , unusually numbered as #000 in the regional Pokédex, and with its type being left unknown."Pokémon Sunday reveals new legendary Pokémon." Bulbanews. July 24, 2010. This Pokémon was identified as the same pointy-eared Pokémon previously seen in the teaser for the fourteenth movie.
A promotional video for Pokémon Black and White released on July 30, 2010, featuring a plethora of new information, including game footage showing an unnamed, deer-like Pokémon and the presumed Evolution of Patrat, named ミルホッグ Miruhoggu."New Black and White info revealed." Bulbanews. July 30, 2010."Pocket Monsters Black/White Promotion Video." Uploaded by 7pum55hexe. YouTube. July 30, 2010. Artwork for the new Pokémon Musical feature with various Pokémon dressed up in costumes was also shown, amongst them being an unnamed swan Pokémon. Information found uploaded to the servers of the Japanese Yahoo! Pokémon site on August 4, 2010 revealed Victini's typing as /, and revealed the name and artwork of the previously seen deer-like Pokémon, シキジカ Shikijika."New information leaked through Yahoo! website." Bulbanews. August 4, 2010. Art of the swan-like Pokémon was also found, as well as art of a new bug Pokémon.
On August 7, 2010, images and reports from the Black and White tour in Japan revealed information about several Pokémon."Leaked images from Black and White tour reveal new Pokémon." Bulbanews. August 7, 2010.Blog post (Japanese). Sasuga Pokémon Brothers. August 7, 2010. The tour revealed a brand new Pokémon in , as well as more information about ギガイアス Gigaiasu, later known in English as . A Japanese blog, Sasuga Pokémon Brothers, also revealed a screenshot of a Pokémon named ダルマッカ Darumakka and shared more details about シキジカ Shikijika, later known in English as . The blog also mentioned a new Pokémon named バスラオ Basurao. 
Within the next couple days, information from the September CoroCoro started to leak out, revealing , , , , and ."September CoroCoro begins to leak." Bulbanews. August 9, 2010. Each of these Pokémon had previously been seen before their full details were released. Drilbur was among the Pokémon seen in the June 27 trailer from Oha Suta, Alomomola was the pink fish Pokémon seen in a screenshot in the July 21 episode of Oha Suta, Swanna and Watchog were first seen in the July 30 promotional video for Pokémon Black and White, and Sewaddle was the bug Pokémon whose artwork was uploaded to the Yahoo! site on August 4. Watchog, known by the unofficial romanization ミルホッグ Miruhoggu, was also confirmed to be the evolved form of Patrat.
 surfaced on August 10, 2010 revealing a Pokémon named タブンネ Tabunne, who's name appeared in text a few days before. This Pokémon was seen again a week later in images posted by the Sasuga Brothers blog from an ad shown in the Yokohama Pokémon Center store, alongside two other new Pokémon, though the Pokémon in the images were all partially obscured by Pokémon Musical accessories."Japanese blog reveals new Pokémon." Bulbanews. August 18, 2010.
Pokémon Sunday revealed the Pokémon on August 21, 2010."Pokémon Sunday reveals new Pokémon Yanappu." Bulbanews. August 21, 2010. Pansage was one of the Pokémon seen in the July image leaks of Bandai toys, previously misnamed as ネズミドリ Nezumidori.
At the turn of August and September 2010, several ads for Pokémon Black and White were released revealing many new details for the upcoming games."Ads for Pokémon Black and White feature unseen footage." Bulbanews. September 1, 2010. One of these ads showed an overworld sprite of a green Pokémon that had not previously been shown."はじめてのポケットモンスター." Uploaded by popo. YouTube. August 31, 2010. 
Many more details were leaked on sites such as in early September 2010."2ch, others leak heap of Black and White info." Bulbanews. September 4, 2010. Leaked images uploaded on 2ch on September 1 revealed artwork of the Evolutions of the new first partner Pokémon. The middle-stage evolved forms of Snivy and Oshawott had previously been seen in the July 1 Best Wishes! character poster. Additionally, a leaked image uploaded on September 4 featured a game screenshot suggesting Pansage to be part of a Grass/Fire/Water trio of monkey Pokémon. 
A silhouette of a cat-like Pokémon circulated in early September 2010, which was unveiled on the TV Tokyo website in a video uploaded on September 6, 2010."TV Tokyo video confirms Tabunne, possibly another creature." Bulbanews. September 6, 2010. The image shown in the video also included the art for the previously seen タブンネ Tabunne. 
On September 11, 2010, a significant number of Pokémon appeared in leaked scans of the October issue of CoroCoro."October CoroCoro begins to leak." Bulbanews. September 11, 2010. Among these Pokémon included several never-before-seen Pokémon, namely , , , , , and . Many previously seen or leaked Pokémon were also fully revealed. , , , and were first seen in a trailer shown on Oha Suta on June 27. The middle-stage evolved forms of Snivy and Oshawott, and respectively, were seen on the July 1 Best Wishes! character poster, and alongside the evolved form of Tepig, , in the earlier 2ch leaks. was previously seen in the Black and White tour in Japan, then known as バスラオ Basurao, a fan translation of its Japanese name. was previously leaked in August and seen in the Yokohama Pokémon Center ads, known by its Japanese name, タブンネ Tabunne. 's overworld sprite was previously seen in an ad circulating in late August. and were revealed to be part of the previously rumored elemental monkey trio alongside Pansage. Lastly, was the cat Pokémon unveiled on TV Tokyo on September 6.
As preorders of Pokémon Black and White began to roll out early, an abundance of information started to leak out on Japanese forums starting on September 16, 2010."Early shipment! Fifth generation begins with a roar." Bulbanews. September 16, 2010. Among the initial information released included the full reveal of several Pokémon that had previously been seen. was first seen in images from the July demo, now confirmed to be the evolved form of Pidove. was previously seen in the August 7 game screenshot shared by the Sasuga Brothers. was one of the Pokémon revealed in the August 18 screenshots from the same blog. Lastly, the fully evolved forms of Snivy, Tepig, and Oshawott, those being , , and , were previously seen in the leaked 2ch images alongside the middle-stage forms. The full Pokédex was then reported within the last couple days before the planned release date.
====Release of Pokémon Black and White====
On September 18, 2010, released in Japan, bringing with it an astounding to the franchise, officially unveiling the full details of every Generation V Pokémon, including all those previously seen or leaked during the prerelease cycle.
===Generation VI===
Alongside the announcement of , in a highly anticipated worldwide stream by Satoru Iwata that aired on January 8, 2013, came the reveal of the first Generation VI Pokémon."Pokémon X and Y announced." Bulbanews. January 8, 2013. The stream revealed the Kalos first partner Pokémon, , , and , as well as a deer-like Pokémon and a bird-like Pokémon, revealed the next day on the official English Pokémon X and Y website to be the game mascots for Pokémon X and Pokémon Y, and , respectively."Legendary Pokémon names revealed." Bulbanews. January 9, 2013.
===Generation VII===
The first Generation VII Pokémon to be revealed to the public was the Mythical Pokémon , after it was leaked in the March issue of CoroCoro magazine, released on February 10, 2016."Magiana revealed by CoroCoro magazine." Bulbanews. February 10, 2016. Magearna was officially revealed four days later on February 14, though its type was still left unknown.
Later that month, during the third presentation on February 27, 2016, the games were announced. Featured in the reveal video was a glimpse of a then-unnamed Pokémon shown as a .Pokémon Sun and Moon announced in Pokémon Direct." Bulbanews. February 26, 2016.
In a trailer released on May 10, 2016, the Alola first partner Pokémon, , , and , were revealed, as well as the two then-unnamed game mascots, a lion Pokémon for Pokémon Sun and a bat-like Pokémon for Pokémon Moon,"Starter Pokémon for Pokémon Sun and Pokémon Moon Revealed!" The Official Pokémon YouTube channel. YouTube. whose names were later revealed to be and , respectively.Tweet revealing Solgaleo and Lunala's official Japanese trademark name and romanization.[dead link] Posted on March 22, 2016."Solgaleo". Pokémon Sun and Pokémon Moon | Pokemon.com/SunMoon. Archived on June 5, 2016."Lunala". Pokémon Sun and Pokémon Moon | Pokemon.com/SunMoon. Archived on June 5, 2016. In a Japanese trailer featuring the new first partner Pokémon, a small dog-like Pokémon can briefly be seen."【ポケモン サン・ムーン】最初のパートナーはこの３匹！モクロー、ニャビー、アシマリってどんなポケモン？". コロコロチャンネル【公式】. YouTube. This Pokémon was later revealed to be on June 11 in an issue of CoroCoro magazine that also revealed ."CoroCoro reveals new Pokémon Nekkoara, Iwanko." Bulbanews. June 11, 2016. 
===Generation VIII===
On Pokémon Day, February 27, 2019, the fifth Pokémon Direct announced with a trailer that ended in a CGI cinematic introducing the Galar first partner Pokémon, , , and ."Pokémon Direct 2.27.2019." The Official Pokémon YouTube channel. YouTube. The sixth Pokémon Direct later aired on June 5, with gameplay revealing , , , , and ."Pokémon Direct 6.5.2019." The Official Pokémon YouTube channel. YouTube. The presentation also featured another CGI cinematic revealing the game mascots, and , whose designs and theming were initially teased through the logos and naming of Shield and Sword, respectively. Additional details regarding each new Pokémon could be found on the official Sword and Shield website as they were revealed, though the types of the game mascots were left unknown until launch.
 and were first showcased on June 11, 2019 during an 2019 demo before their official reveal. Yamper was officially revealed on July 8 in a trailer that also revealed , , and ."Gigantamaxing Changes the Game in Pokémon Sword and Pokémon Shield!" The Official Pokémon YouTube channel. YouTube. A trailer on August 7 introduced regional forms of and , as well as their new Evolution, ."A New Team and New Rivals in Pokémon Sword and Pokémon Shield!" The Official Pokémon YouTube channel. YouTube. The trailer also revealed a Pokémon named . A segment of a Nintendo Direct that aired on September 4 revealed and ."Nintendo Direct 9.4.2019." Nintendo of America. YouTube. The segment also showed off Cramorant's new signature Ability, , in which it catches a fish-like creature in its mouth during the moves or and spits it out at its attacker after taking damage.
An update to the official Pokémon Sword and Shield website on September 13, 2019 added a page for a new Pokémon, but with its appearance, name, , and height heavily pixelated.Archive of teaser page from September 13, 2019. Pokémon Sword and Pokémon Shield | Official Website. Five days later, a trailer revealed the Pokémon to be , a new Evolution of in Galar."Meet Sirfetch’d in Pokémon Sword!" The Official Pokémon YouTube channel. YouTube. A trailer on November 12Simultaneously November 11, 2019 in North America, due to time zones. featured glimpses of two unidentified Pokémon bearing some resemblance to and , respectively."Galar Research Recap | #PokemonSwordShield." The Official Pokémon YouTube channel. YouTube.
====Release of Pokémon Sword and Shield====
 released on November 15, 2022, making available all , including previously unidentified or unacknowledged Pokémon. Specifically, the fish-like creature caught by in the September 4 Nintendo Direct was discovered to be a Pokémon named , and the two unidentified Pokémon from the November 12 trailer were found to be Evolutions of and Galarian , named and , respectively. Additionally, and 's full details were uncovered, and , who had made several appearances before the games' release, was fully introduced. It was also learned that is the Evolution of a regional form of , rather than simply a region-based Evolution of regular Farfetch'd.
====The world of Pokémon expands once more====
January 9, 2020 saw the airing of the seventh Pokémon Direct, which announced the , as well as several new Pokémon to be included in it."Pokémon Direct - 09.01.2020." NintendoAU. YouTube. Part 1 of the DLC expansion, entitled The Isle of Armor, would feature the Legendary Pokémon, and , and Part 2, The Crown Tundra, would feature the Legendary Pokémon . The Crown Tundra would also include two then-unidentified Legendary Pokémon resembling the legendary giants.
The silhouette of a new Pokémon was revealed in the February 2020 issue of CoroCoro and later by The Pokémon Company International on February 15, 2020. The Pokémon was ultimately revealed to be the Mythical Pokémon on Pokémon Day, February 27."Meet Zarude, the Rogue Monkey Pokémon in #PokemonSwordShield!" The Official Pokémon YouTube channel. YouTube.
The official Pokémon Sword and Shield website updated on June 2, 2020, revealing and , the previously unidentified Pokémon now confirmed to be new members of the legendary giants."Newly Discovered Pokémon." Pokémon Sword and Pokémon Shield | Official Website. (archive)
====Release of The Isle of Armor and The Crown Tundra====
The Isle of Armor released on June 17, 2020, making available and , after an update that also added , which would later be obtainable via event distribution.
With the release of The Crown Tundra on October 23, 2020,Simultaneously October 22, 2020 in North America, due to time zones. two new Legendary Pokémon were introduced in and , alongside the full release of , , and .
====New Pokémon in an old world====
 and were first seen in a trailer for released as part of the fourth Pokémon Presents, which aired on August 18, 2021."Pokémon Presents | 8.18.21". The Official Pokémon YouTube channel. YouTube. would then be introduced in a trailer released on September 28, 2021."Encounter Noble Pokémon in Pokémon Legends: Arceus!" The Official Pokémon YouTube channel. YouTube.
====Release of Pokémon Legends: Arceus====
 released on January 28, 2022, introducing , , , and the Legendary Pokémon , in addition to the previously revealed , , and . Basculegion was also discovered to have gender differences and to be the evolved form of White-Striped , which is considered a regional form. 
Overqwil and its pre-evolved form were previously hinted at in before their official release, where they were referenced in a book in the Canalave Library. Additionally, a silhouette of Sneasler climbing a mountain was leaked months prior to its release.Leaked image of Sneasler.
===Generation IX===
The first Generation IX Pokémon were revealed alongside in the sixth Pokémon Presents, which aired on Pokémon Day on February 27, 2022."Pokémon Presents | 2.27.2022." The Official Pokémon YouTube channel. YouTube. The presentation revealed the Paldea first partner Pokémon, , , and . A second trailer was released on June 1, revealing , , and ."Second Trailer | Pokémon Scarlet and Pokémon Violet." The Official Pokémon YouTube channel. YouTube. The trailer also revealed the game mascots, and , whose designs and theming were previously teased in Scarlet and Violet's logos, respectively. On August 3, another Pokémon Presents revealed and , and also featured a glimpse of a mysterious vehicle."Pokémon Presents | 08.03.2022." The Official Pokémon YouTube channel. YouTube. On August 21, a trailer revealed a Pokémon resembling Koraidon and Miraidon, named ."Competitive Play Trailer | Pokémon Scarlet and Pokémon Violet." The Official Pokémon YouTube channel. YouTube. The official Scarlet and Violet website unveiled the names and other details of each of the new Pokémon as they were revealed, though the types of the two new Legendary Pokémon remained a mystery until the games' release.
The official English Pokémon Twitter account posted images on August 29, 2022 depicting strange markings on trees in the Paldea region.Tweet by Pokémon (@Pokemon). Posted on August 29, 2022. The next day, another post revealed that the markings were made by a Pokémon named , shown in three images as a blurry silhouette.Tweet by Pokémon (@Pokemon). Posted on August 30, 2022. The Pokémon was then fully revealed on September 1 in a video posted to the official Pokémon Twitter and YouTube accounts.Tweet by Pokémon (@Pokemon). Posted on September 1, 2022."Grafaiai makes its mark! | Pokémon Scarlet & Pokémon Violet." The Official Pokémon YouTube channel. YouTube.
 
A trailer on September 7, 2022 provided a better look at the aforementioned mysterious vehicle, which now had a visible eye and rear engines."Seek Your Treasure! | Pokémon Scarlet & Pokémon Violet." The Official Pokémon YouTube channel. YouTube. The Scarlet and Violet website revealed it to be a type of custom car called the Starmobile."Your Own Story, Woven Through Your Treasure Hunt." Pokémon Scarlet and Pokémon Violet | Official Website. Each of the Team Star squad's bosses would appear riding their own Starmobile, which would get in the way and need to be defeated in battle in addition to the bosses' other Pokémon. Artwork on the site also revealed the Starmobiles to have tongues. Additionally, the trailer revealed , including a one known as the Stony Cliff , as well as and .
A video revealing , a Pokémon resembling , was released on September 28, 2022."World Pokémon Ecological Society." (Video archived by Serebii on September 28, 2022.) While the video initially speculated that Wiglett would be a regional form of Diglett, it was concluded that Wiglett is in fact an entirely different species.
On October 6, 2022, a trailer revealed a new Evolution of , named ."Jump into a Paldean Journey | Pokémon Scarlet and Pokémon Violet." The Official Pokémon YouTube channel. YouTube. Several other new Pokémon could also briefly be seen in this trailer, though they were not acknowledged at the time and their names and details were unknown. 4 minutes and 8 seconds into the trailer, a Pokémon resembling Armarouge and Ceruledge could be seen behind . At 7 minutes and 16 seconds, a few new Pokémon (and ) were visible on the minimap. At 9 minutes and 34 seconds, a new Pokémon could very briefly be seen obscured by the camera guide while is on-screen.
A video released on October 12, 2022 featuring a livestream by Iono asked fans to guess her partner Pokémon, described as a cute, squishy, that has two bumps on its head that people always mistake for eyes, a body that expands and contracts to generate electricity in its belly, and an easygoing vibe."Guess Iono's Partner Pokémon! | Pokémon Scarlet and Pokémon Violet." The Official Pokémon YouTube channel. YouTube. Two days later, a second livestream revealed the Pokémon to be ."Meet Bellibolt | Pokémon Scarlet and Pokémon Violet." The Official Pokémon YouTube channel. YouTube.
A teaser video about Pokémon in Paldea was posted to the official Pokémon Twitter account on October 24, 2022, including a couple brief glimpses of a purple light on the ground.Tweet by Pokémon (@Pokemon). Posted on October 24, 2022. The second part of the video was uploaded the next day, revealing ."A new Ghost-type Pokémon appeared in Paldea!" The Official Pokémon YouTube channel. YouTube.
A special website went live on November 5, 2022, showcasing a treasure chest and a counter, which periodically ticked upwards every few hours as it was slowly filled with coins.Earliest archive of https://chest.pokemon.com/ from November 5, 2022. The same day, a mysterious Pokémon appeared in after the Community Day Classic event ended. Golden PokéStops were added to the game, and spinning one would cause a small grey Pokémon to show up and follow the player for a short time, although it could not be properly encountered or caught. The next day, the counter on the special website eventually capped out at 999, and the site became a redirect to a new page on the Scarlet and Violet website featuring an embedded YouTube video revealing ."Investigations into a Newly Discovered Pokémon Are Under Way!" Pokémon Scarlet and Pokémon Violet | Official Website."Where are these mysterious coins coming from? | Pokémon Scarlet and Pokémon Violet." The Official Pokémon YouTube channel. YouTube. A brief glimpse of Gimmighoul could partially be seen in a brief shot from the October 6 trailer before the Pokémon's official reveal. 
Glimpses of two new Pokémon resembling could be seen in a music video uploaded to the official Pokémon YouTube channel on November 8, 2022."The Newest Chapters in the Pokémon Series | Pokémon Scarlet and Pokémon Violet." The Official Pokémon YouTube channel. YouTube. The Scarlet and Violet website described the two Pokémon as "unidentified creatures" and "monsters" known as "" and ""."The Scarlet Book and the Violet Book." Pokémon Scarlet and Pokémon Violet | Official Website. "Great Tusk" was described as "a savage monster" with a "large body and tusks", while "Iron Treads" was described as being able to curl its body and roll to attack, leaving "a trail gouged into the ground, as if it had scorched the earth."
====Release of Pokémon Scarlet and Violet====
With the release of on November 18, 2022, , including previously unidentified or partially revealed species, now had their names, types, and other details officially available. Specifically, the Starmobiles were discovered to be possessed by and , and the remaining four unidentified Pokémon previously seen in the October 6 trailer were found to be , , , and . Additionally, and were fully introduced, and and 's full details were uncovered.
====More Pokémon to Treasure====
The seventh Pokémon Presents, which aired on Pokémon Day on February 27, 2023, revealed two new Paradox Pokémon, and , which were made available to catch in , respectively, in a Tera Raid Battle event that began shortly after the broadcast."Pokémon Presents | 2.27.2023." The Official Pokémon YouTube channel. YouTube. Walking Wake and Iron Leaves were previously hinted at in the Scarlet Book and Violet Book, which included sketches depicting an imaginary creature based on the Paradox Pokémon found in Area Zero. The drawing in the Scarlet Book resembles the three Legendary beasts, while the one in the Violet Book resembles the three Swords of Justice.
The presentation also announced DLC content for Pokémon Scarlet and Violet, entitled The Hidden Treasure of Area Zero, as well as several Pokémon that would be included in it. The first half of the DLC, The Teal Mask, would feature , , and , as well as the Legendary Pokémon . The second half, The Indigo Disk, would feature the Legendary Pokémon . The types and other details of the new Pokémon were left unknown at the time of their reveal.
Okidogi, Munkidori, and Fezandipiti were previously hinted at in Scarlet and Violet in a poster outside of the Treasure Eatery in Medali, containing stylized silhouettes of the three Pokémon. Additionally, a sketch of a Pokémon similar to Terapagos appeared in the Scarlet Book and Violet Book.
An unnamed Pokémon resembling first appeared in the second episode of Pokémon Horizons: The Series on April 14, 2023. Three days later, the official English Pokémon Twitter account posted official art of the Pokémon and revealed that it would be obtainable in The Hidden Treasure of Area Zero.Tweet by Pokémon (@Pokemon). Posted on April 17, 2023. Another tweet was also posted three hours later regarding the Pokémon's appearance in the animated series and its mysterious connection to Liko's pendant.Tweet by Pokémon (@Pokemon). Posted on April 17, 2023.
The eighth Pokémon Presents aired on August 8, 2023 and closed with several announcements for Pokémon Scarlet and Violet, including the reveal of , , , and ."Pokémon Presents | 8.8.2023" The Official Pokémon YouTube channel. YouTube. The presentation also revealed that the previously unnamed Pokémon that first appeared in the animated series is actually the of Terapagos, while the previously revealed form of Terapagos is its . Additionally, Ogerpon was revealed to have a unique appearance while Terastallized.
A video posted to YouTube on August 22, 2023 revealed a new Pokémon similar to , named ."The Haunting Tale of Poltchageist." The Official Pokémon YouTube channel. YouTube. The Pokémon was first teased during the 2023 Pokémon World Championships, where attendees were given a tea ceremony set with the date of the reveal trailer's release included. Additional teasers included the official Pokémon website featuring a background decorated with matcha powder, as well as a Kitakami poster advertising the in-universe theatrical performance shown in the trailer.
====Release of The Teal Mask====
The Teal Mask released on September 13, 2023, bringing with it seven new Pokémon. In addition to the proper debut of the six previously revealed Pokémon, including , , , and , the evolved form of was discovered to be , a Pokémon resembling . Furthermore, was found to have three other aside from the form that was first shown, each with their own unique Terastallized state.
====Release of The Indigo Disk====
The Indigo Disk was released on December 14, 2023, with a total of seven new Pokémon making their debut. In addition to the four previously revealed Pokémon, namely , , , and , an evolved form of was discovered named . Furthermore, Terapagos was found to have a third form aside from the two forms that were first shown, a unique Terastallized state known as its . Two more Paradox Pokémon were also discovered in and . 
====Release of Mochi Mayhem====
An epilogue for The Hidden Treasure of Area Zero, titled Mochi Mayhem, officially became available on January 11, 2024,"A new adventure in the Land of Kitakami awaits!" The Official Pokémon YouTube channel. YouTube. bringing with it one new Pokémon, the Mythical Pokémon . This Pokémon was previously discoverable in the game code, due to the data for the epilogue being implemented alongside The Indigo Disk.
Before the reveal of Pecharunt, it appeared partially obscured with its shell closed in the story about told by Yukito in The Teal Mask. What appeared to be a Pecharunt doll could also be seen at Peachy's in Mossui Town.
==Trivia==
* Before the release of Generation II, several Pokémon-like creatures designed by Ken Sugimori were shown as part of volume 14 of the Bimonthly Game Review (Japanese: 隔月刊ゲーム批評) magazine, which published in early April 1997.Bimonthly Game Review magazine, Vol. 14 (April 1997). MicroDesign Publishing. (transcript with English translations; Plague von Karma's scan with English translations and translator notes) Of these designs, one in particular bears a striking resemblance to what would later be , a Pokémon that would not otherwise be seen until released in Japan on November 21, 1999.
==Related articles==
* List of unused Pokémon and character designs
* Core series
* Pokémon discovery
* History of Pokémon
==Notes==
==References==
==External links==
* Every Pokemon Revealed Before Their Generation! - Video uploaded by Dobbs to YouTube on August 11, 2021, detailing several Pokémon revealed before their game debut across each generation.
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