List of Pokémon by gender ratio

This is a list of Pokémon by gender ratio.
Most Pokémon are either male or female. However, depending on the species, players are more likely to encounter a Pokémon of a specific gender than the other. Gender plays a vital role in , as offspring inherit the species of the mother and compatible moves from the father. However, Pokémon of either gender can be used if the partner is a .
From Generation III onward, due to how the core series Pokémon games incorrectly determine a Pokémon's gender from its personality value, the ratios stated below are idealized approximations. From Generation III to V, Pokémon are more likely to be male than the nominal ratio; from Generation VI to VII, Pokémon are more likely to be the more common gender than the nominal ratio, with Pokémon with a 1:1 ratio being unaffected; in Generation VIII, Pokémon are more likely to be the more common gender than the nominal ratio, with Pokémon with a 1:1 ratio being more likely to be male. Pokémon which are always one particular gender are unaffected.
==Male only==
These Pokémon only appear as male. As a result, these Pokémon are incapable of producing offspring of the same species without or a female counterpart (in the case of family, , , and ).
===Unbreedable===
Despite being gendered, these Pokémon cannot breed.
==1 ♀ : 7 ♂==
These Pokémon normally appear as male, rarely female. This specific gender ratio is used to make it more difficult in breeding more of them since players usually get them as gifts or Fossils rather than catch them in the wild. Most first partner Pokémon (except Pikachu) and all Fossil Pokémon introduced prior to Generation VIII are in this group, as well as some other Pokémon normally not found in the wild. In addition, two Pokémon that can be found in the wild, and , are in this group, likely because only the females of these species evolve, thus creating a challenge for the player to find them. Because shininess and gender were determined by IVs in Generation II, these Pokémon cannot be both shiny and female in that generation.
===Unbreedable===
Despite being gendered, these Pokémon cannot breed.
==1 ♀ : 3 ♂==
These Pokémon usually appear as male, but can be female.
===Unbreedable===
Despite being gendered, these Pokémon cannot breed.
==1 ♀ : 1 ♂==
These Pokémon have an equal chance of being either male or female. The majority of Pokémon (roughly 65% of all species) fall under this category. 
===Unbreedable===
Despite being gendered, these Pokémon cannot breed.
==3 ♀ : 1 ♂==
These Pokémon usually appear as female, but can be male.
===Unbreedable===
Despite being gendered, these Pokémon cannot breed.
==7 ♀ : 1 ♂==
These Pokémon normally appear as female, rarely male.
==Female only==
These Pokémon only appear as female. As a result, prior to Generation VI, they are incapable of passing Egg moves to offspring without the help of or a male counterpart.
===Unbreedable===
Despite being gendered, these Pokémon cannot breed.
==Gender unknown==
Pokémon in these lists are gender unknown. The ones in this list can breed only with .
===Unbreedable===
These Pokémon species are gender unknown and cannot breed. Most of these Pokémon are , , Ultra Beasts, or Paradox Pokémon.
==Trivia==
* Generation IX added the most Pokémon species whose gender is unknown, with a total of 33.
* Prior to Generation VI, because Azurill's gender ratio does not match that of its evolved forms and its evolution is not dependent on gender, being female 75% of the time while Marill and Azumarill are female only 50% of the time, female Azurill has a 1/3 chance of evolving into a male Marill (depending on its personality value). Azurill is the only Pokémon to do this. From Generation VI on, Azurill retains its gender upon evolving, despite the gender ratios still differing.
* While Terapagos as a species has a 50-50 gender ratio, the only Terapagos encounter is set to always be male. Because of this, a female Terapagos cannot currently be legitimately obtained.
==Related articles==
es:Lista de Pokémon con sexo especial
fr:Liste des Pokémon par répartition des sexes
it:Elenco Pokémon per distribuzione del sesso
zh:宝可梦列表（按性别比例分类）