Gender unknown

Gender unknown (Japanese: sex unknown) is a gender designation that species of can have. Pokémon such as , , and that display neither a nor symbol in or on their summary screen are gender-unknown Pokémon.
==Terminology==
In English-language official media, these Pokémon are generally referred to as being gender unknown, as having or being of unknown gender, or simply by stating that their gender is unknown. As a prenominal adjective, it is generally hyphenated, such as in "gender-unknown Pokémon", though it has also appeared without being hyphenated.Pokémon Sun & Pokémon Moon: The Official Strategy Guide, p. 288-9; excerpts: "find Pokémon Eggs for a gender unknown Pokémon", "including gender unknown ones", "leave a male or gender unknown Pokémon"
Alternate terms that have been used officially include:
* no gender, which was used in a strategy article on Pokémon.com during Generation VIII and in various official guidebooks during Generations II and IV;
* genderless, which was used in the Prima Games Pokémon Gold & Silver: Prima's Official Strategy Guide guidebook, in the Nintendo Power Pokémon Gold and Silver: Complete Pokédex guidebook, in Pokémon.com mailbag responses from November 2002 and January 2003, and in a previous version of the Play! Pokémon Video Game Rules, Formats & Penalty Guidelines document;
* neuter, which was used in Nintendo Power guidebooks during Generation II; and
* indeterminate gender, which was used in Pokémon Platinum: Prima's Official Strategy Guide.Pokémon Platinum: Prima's Official Strategy Guide, p. 384; excerpt: "Metagross is of indeterminate gender"
In , , , Siena on mentions that there are some Pokémon whose gender can't be told or that are neither male nor female; both of these merely correspond to usages of 「」 "sex unknown" in Japanese.
The Japanese versions of the games also refer to gender-unknown Pokémon as having (Japanese: せいべつなし no gender, formatted in kanji as なし no gender in Pokémon: Let's Go, Pikachu! and Let's Go, Eevee! and Pokémon HOME on the Nintendo Switch) in the search feature of the Pokémon Storage System and Pokémon HOME. The official Japanese site for also refers to gender-unknown Pokémon as (Japanese: 性別のないポケモン Pokémon without a gender).
===As an Egg Group===
In Pokémon Stadium 2 and in official Japanese and Chinese guidebooks for the Generation II and games, Gender unknown also refers to an Egg Group consisting of gender-unknown Pokémon that are able to breed with , but this Egg Group has never actually existed in the coding of the games. In these sources, gender-unknown Pokémon are listed in this Egg Group rather than in their actual Egg Groups. While Pokémon Diamond and Pearl: Official Nintendo Player's Guide also lists Gender Unknown as an Egg Group, it lists the Pokémon with their actual Egg Groups in the data section.
In Pokémon Emerald: Prima's Official Strategy Guide, Pokémon 10th Anniversary Collector's Edition Complete Pokédex, and early Japanese official guidebooks for , gender-unknown Pokémon are instead listed in the group, as these books do not cover the role plays in breeding. This was likely due to it not being available at release until it could be traded from a later game, or not being available until after obtaining the National Pokédex in the Desert Underpass. Official guidebooks since Generation IV consistently list gender-unknown Pokémon in their actual Egg Groups.
==Mechanics==
Gender-unknown Pokémon (except Ditto) can only with . However, most gender-unknown Pokémon are in the group, meaning that those Pokémon cannot breed at all. Ditto itself can be bred with any Pokémon that can breed (except Ditto), but the Eggs produced are always based on the other Pokémon's species. Prior to Pokémon Scarlet and Violet, gender-unknown Pokémon could not inherit Egg Moves.
In battle, gender-unknown Pokémon are immune to gender-based effects. They cannot become infatuated nor infatuate other Pokémon. The moves and fail if used by or on these Pokémon. The and do not affect gender-unknown Pokémon and have no effect if possessed by them.
==Characteristics==
While most Pokémon are either male or female, gender-unknown Pokémon are characterized by the fact that they are not known to be of either gender. In-universe, this is because no one has been able to the gender of these Pokémon, including scientists.
Most of these Pokémon are in the group. Of these, the , , Ultra Beasts, or Paradox Pokémon are often represented by only a single individual in the game's story. While multiple , , and can be encountered in the , they also cannot be hatched from an Egg. The Galar fossil Pokémon also have unknown gender; this may reference their nature. Although some of these Pokémon have been observed hatching from Eggs, Eggs containing these Pokémon cannot be obtained in-game.
Of the gender-unknown Pokémon that can breed, most of them are based on machines or other inanimate objects that do not have a biological sex, or are based on lifeforms that can . Almost all of them are in the group, including many artificial Pokémon such as and . Apart from these, and are based on , which are known for ; and , , and consist of multiple individuals with different roles, similar to a .
==Pokémon==
Of the Pokémon species, are gender unknown (%).
===Breedable===
{| border=1 width="100%" style="background: #0080C0; border: 1px solid #0080C0; border-collapse: collapse"	 				
#	 				Egg Groups
===Unbreedable===
{| border=1 width="100%" style="background: #0080C0; border: 1px solid #0080C0; border-collapse: collapse"	 				
#	 				Egg Groups
==In animation==
In To Catch a Rotom!, after tries to have her use on three , remarks that Rotom are neither male nor female.To Catch a Rotom!: says "I'm afraid Rotom are neither male nor female. And that's the reason Attract had no effect on them." (Japanese: 「いや、ロトムにオスとメスの区別はないぞ。だから、メロメロの効果を受けないんじゃ。」 )
==In other languages==
Gender unknown
Unknown
Unknown/Gender unknown
==References==
Multiple sources:
* Pokémon Sun & Pokémon Moon: The Official Strategy Guide, p. 288; excerpt: "scientists have been unable to determine any gender for them"
* Pokémon Ultra Sun & Pokémon Ultra Moon: The Official Alola Region Strategy Guide, p. 359; excerpt: "no one's been able to determine their gender"
* : An NPC in the Pokémon Center, with a gender-unknown Pokémon in the first slot of the party: "Your <Pokémon>... Its gender is unknown." (Japanese: 「あなたの　<Pokémon>って……　が　わからないのね！」 "Your <Pokémon>... I can't tell what gender it is!")
Multiple sources:
* Pokémon Stadium 2: "Gender unknown" is listed as an Egg Group at Earl's Pokémon Academy
* Pokémon Bank: "Gender Unknown" can be selected as a search option
* Pokémon HOME (Nintendo Switch): "Gender unknown" can be selected as a filter under "Form" in the Pokédex
* Pokémon HOME (mobile): "Gender unknown" can be selected as a search option
* Pokémon GO: genderunknown can be used as a search filter
* New Pokémon Snap: "Gender Unknown" is a possible value for the "Gender" field in the Photodex
* Pokémon Sun & Pokémon Moon: The Official Strategy Guide, p. 288; excerpt: 'Some Pokémon are also recorded as "gender unknown"'
* Pokémon Ultra Sun & Pokémon Ultra Moon: The Official Alola Region Strategy Guide, p. 359; excerpt: "Some Pokémon appear as gender unknown"
* Pokémon Sword & Pokémon Shield: The Official Galar Region Strategy Guide, p. 235; excerpt: "is male or gender unknown"
Multiple sources:
* Pokémon X and Y: A scientist on 2F says "There are male Pokémon, female Pokémon, and even Pokémon with unknown genders." (Japanese: 「ポケモンには　オスと　メス　そして　が　います」)
* The Details of Discovering Pokémon Eggs | Pokemon.com: "When Ditto is paired with a Pokémon in the Day Care, the Pokémon that hatches from the Egg you find will be the same as (or an Evolution of) the paired Pokémon, whether it is male, female, or of unknown gender."
* Pokémon Brilliant Diamond and Pokémon Shining Pearl Trainers Guide | Raising and Evolving Pokémon | Official Website | Pokémon: "Not only can Ditto be paired with male or female Pokémon, it's also the only Pokémon that's known to be compatible with Pokémon of unknown gender."
* Pokémon Diamond and Pearl Pokédex, p. 394; excerpt: "Pokémon of unknown gender that can reproduce with Ditto", "Bronzong is of unknown gender"
* Pokémon Platinum: Prima's Official Strategy Guide, p. 384; excerpt: "Some Pokémon are of unknown gender", "Pokémon of unknown gender that can lead to Eggs being found"
* Pokémon Black and White Pokédex, p. 123: excerpt: "Pokémon of unknown gender that can produce Eggs"
Multiple sources:
* : In the party screen, the text "<sc>Male</sc>", "<sc>Female</sc>", or "<sc>Unknown</sc>" is displayed for each Pokémon when depositing a Pokémon at the 
* , , , , , Let's Go, Pikachu!, Let's Go, Eevee!, , , , and : "Unknown" can be selected as a filter under "Gender" in the Pokémon Storage System
* Pokémon Stadium 2: A Pokémon's gender can be described as "unknown"
* Pokémon HOME (Nintendo Switch): "Unknown" can be selected as a filter under "Gender" in the Pokémon List
* Pokédex 3D, Pokédex 3D Pro, Pokédex for iOS: "Unknown" is a possible value for the "Gender" field
* Pokémon.com Pokédex: "Unknown" is a possible value for the "Gender" field
* : An NPC in the Pokémon Center, with a gender-unknown Pokémon in the first slot of the party: "Your <Pokémon>... Its gender is unknown."
* Pokémon Video Game Glossary | Pokemon.com: "The gender of a Pokémon is designated as male, female, or unknown."
* Pokémon Diamond and Pearl Pokédex, p. 10; excerpt: "There are some Pokémon whose gender is unknown."
* Pokémon HeartGold and SoulSilver Pokédex, p. 185, 198; excerpts: "or who whose gender is unknown", "Porygon2's gender is unknown", "Some Pokémon's gender is unknown."
* Pokémon Black and White Pokédex, p. 10, 123, 212, 214, 288: excerpts: "Some Pokémon's genders are unknown.", "whose gender is unknown", "the target's gender is unknown", "No effect when the gender is unknown."
* Pokémon Sword & Pokémon Shield: The Official Galar Region Strategy Guide, p. 234-5; excerpt: "in some cases, all the Pokémon of a species will be of just one gender or their gender will be unknown altogether"
* Electric- and Steel-Type Egg Event | News | Pokémon Masters EX official site: "The gender of Pokémon listed with △ are unknown."
Multiple sources:
* Pokémon HeartGold and SoulSilver Pokédex, p. 185; excerpt: "Gender-unknown Pokémon who can leave Eggs"
* Pokémon Ultra Sun & Pokémon Ultra Moon: The Official Alola Region Strategy Guide, p. 359; excerpts: "find an Egg from a gender-unknown Pokémon", "find Eggs from male Pokémon or gender-unknown Pokémon"
* Pokémon Sword & Pokémon Shield: The Official Galar Region Strategy Guide, p. 234-5: excerpts: "find the Eggs of some gender-unknown Pokémon", "leave a male or gender-unknown Pokémon"
Multiple sources:
* Train, Raid, and Hatch Pokémon to Breed Victories in Pokémon Sword and Pokémon Shield | Pokemon.com
* Pokémon Gold and Silver: Official Nintendo Player's Guide, p. 95; excerpt: "Ditto has no gender", "Some Pokémon do not have a gender"
* Pokémon Gold & Silver: Prima's Official Strategy Guide, p. 19; excerpt: "or no gender (such as a Magnemite)."
* Pokémon Crystal: Official Nintendo Player's Guide, p. 25; excerpt: "Ditto has no gender", "Some Pokémon do not have a gender"
* Pokémon Diamond and Pearl: Official Nintendo Player's Guide, p. 32; excerpt: "Ditto has no gender"
* Pokémon Diamond and Pearl: Prima's Official Strategy Guide, p. 273; excerpt: "Has no effect on Pokémon that have no gender."
* Pokémon Diamond and Pearl Pokédex, p. 394; excerpt: "Some Pokémon don't have a gender"
Multiple sources:
* Pokémon Gold & Silver: Prima's Official Strategy Guide, p. 19-20; excerpt: "Exceptions to the male/female rule involve the genderless Pokémon, Ditto.", several Pokémon are listed as "Genderless Pokémon"
* Pokémon Gold and Silver: Complete Pokédex, p. 37-8; excerpt: "The genderless Pokémon can produce Eggs if paired with a Ditto.", "whether the Pokémon is male, female or genderless", "because they are pre-evolutions, one-of-a-kind or genderless"
* Letters to the Editor! | 11/27/2003 | The Official Pokemon.com Site (archived)
* Letters to the Editor! | 1/17/2003 | The Official Pokemon.com Site (archived)
* Play! Pokémon Video Game Rules, Formats & Penalty Guidelines - October 23, 2019, February 13, 2020 (archived): "A genderless Pokémon is listed as male or female on the team list."
Multiple sources:
* Pokémon Gold and Silver: Official Nintendo Player's Guide, p. 95; several Pokémon are listed as "Neuter"
* Pokémon Gold and Silver: Complete Pokédex, p. 37; several Pokémon are listed as "Neuter"
* Pokémon Crystal: Official Nintendo Player's Guide, p. 25; several Pokémon are listed as "Neuter"
Multiple sources:
* : Siena on says "What can I tell you about Pokémon? Well, there are males and females. And some that you can't tell!" (Japanese: 「ポケモンで　しってること？　そうねー　ポケモンには　メスと　オス　それと　せいべつふめいが　いるよ！」)
* : Siena on says "I know all sorts of things about Pokémon! Let's see... There are males and females, and some aren't either!" (Japanese: 「あたし　ポケモンに　くわしいよ！　えっとー　ポケモンには　メスと　オス　それと　せいべつふめいが　いるの！」)
* : Siena on says "What can I tell you about Pokémon? Well, there are males and females. And some that you can't tell." (Japanese: 「ポケモンで　ってること？　そうねー　ポケモンには　メスと　オス　それと　が　いるよ！」)
Multiple sources:
* , , , , , Let's Go, Pikachu!, Let's Go, Eevee!, , , , and : "Unknown" (Japanese: せいべつなし / 性別なし) can be selected as a filter under "Gender" in the Pokémon Storage System
* Pokémon HOME (Nintendo Switch): "Unknown" (Japanese: 性別なし) can be selected as a filter under "Gender" in the Pokémon List
* Pokémon HOME (mobile): "Gender unknown" (Japanese: せいべつなし) can be selected as a search option
イッシュ図鑑を完成させよう！｜『ポケットモンスターブラック２・ホワイト２』公式サイト; excerpt: 「♂のポケモンしかいなかったり、性別のないポケモンのタマゴが欲しいとき」 "If you only have a male Pokémon, or want an Egg of a Pokémon without a gender"
Category:Game mechanics
Category:Pokémon world
it:Genere sconosciuto (Gruppo Uova)
ja:性別不明
zh:性别不明（蛋群）