In the main series
Major appearances
A Nidoran couple appeared Wherefore Art Thou, Pokémon?, where they were in love with one another, much to the dismay of their Trainers, who hated one another. After the battle with Team Rocket, upon which she kissed Ralph's Nidoran♂, Emily's Nidoran♀, nicknamed Maria, evolved into a Nidorina.
Multiple Nidoran♀ appeared in Leading a Stray!, where they were among the Pokémon assisting a Luxio in its efforts to help a Wailmer trapped in the sewers.
Minor appearances
Nidoran♀ debuted in Sparks Fly for Magnemite, where she was seen in Gringey City's Pokémon Center.
Multiple Nidoran♀ appeared in Showdown at the Po-ké Corral, where they were among the Pokémon living at Professor Oak's Laboratory. These Nidoran♀ were colored the same way as Shiny Nidoran♀, but they predated the introduction of Shiny Pokémon.
A Nidoran♀ appeared in Pikachu's Vacation as one of the Pokémon seen at the Pokémon Theme Park.
A Nidoran♀ briefly appeared in Lights, Camera, Quack-tion.
A Valencia Island variant of Nidoran♀ appeared in Poké Ball Peril.
A Nidoran♀ appeared in The Power of One.
A Nidoran♀ appeared in the Japanese credits of Pikachu's Rescue Adventure.
A pink Nidoran♀ appeared in In the Pink as a resident of Pinkan Island. Team Rocket attempted to capture her and her male counterpart, but they ended up being chased off by a pink Nidoking.
A Nidoran♀ briefly appeared in The Chikorita Rescue alongside a Nidoran♂.
A Nidoran♀, along with a Nidoran♂, briefly appeared in Going Apricorn! at Professor Oak's Laboratory, where they were being fed by Tracey.
A Nidoran♀ appeared in A Farfetch'd Tale alongside a Nidoran♂.
A Nidoran♀ appeared in The Fortune Hunters as one of the Pokémon stolen by Butch and Cassidy.
A Nidoran♀ appeared in Beauty and the Breeder.
A Nidoran♀ appeared in Celebi: The Voice of the Forest.
A Nidoran♀ appeared in Fangs for Nothin' as an inhabitant of the Dragon Holy Land. Multiple other Nidoran♀ appeared in the follow-up episode, also as inhabitants of the Dragon Holy Land.
A Nidoran♀ was used by one of the students of the Pokémon Trainers' School in Gonna Rule The School!.
A Nidoran♀ appeared in Showdown at the Oak Corral, where it was among the Pokémon living at Professor Oak's Laboratory.
Multiple Nidoran♀ appeared in the opening sequence of Destiny Deoxys.
A Nidoran♀ appeared in PK13.
A Nidoran♀ appeared in Beg, Burrow and Steal.
A Nidoran♀ appeared in Lucario and the Mystery of Mew as one of the Pokémon living in the Tree of Beginning.
A Nidoran♀ appeared in The Green Guardian.
A Nidoran♀ appeared in Off the Unbeaten Path.
A Nidoran♀ appeared in Odd Pokémon Out! as a resident of Camomile Island.
A Nidoran♀ appeared in a flashback in Gathering the Gang of Four!.
A Coordinator's Nidoran♀ appeared in Once More With Reeling!, where it was seen participating in the Terracotta Contest.
A Nidoran♀ appeared in Pokémon Ranger and the Kidnapped Riolu! (Part 1). Four additional Nidoran♀ appeared in the follow-up episode.
Multiple Nidoran♀ made a cameo in Arceus and the Jewel of Life.
A Nidoran♀ appeared in SS028.
Multiple Nidoran♀ appeared in Diancie and the Cocoon of Destruction.
A Nidoran♀ appeared in Pikachu and the Pokémon Music Squad. She was among the Pokémon residing in a forest.
A Nidoran♀ appeared in A Watershed Moment! in a flashback.
A Trainer's Nidoran♀ appeared in Alola to New Adventure! during a flashback.
A Nidoran♀ appeared in Loading the Dex! as a silhouette that Rotom brought up.
A Nidoran♀ appeared in I Choose You!. She was among the Pokémon taking shelter from the rain in a cave alongside Entei.
Pokédex entries
Episode
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Pokémon
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Source
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Entry
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EP100
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Nidoran♀
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Ash's Pokédex
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Nidoran♀. Its poison pin is quite powerful for its size, but its horn is smaller than a male's.
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In Pokémon Origins
A Youngster's Nidoran♀ appeared in File 1: Red.
A Nidoran♀ appeared in File 3: Giovanni at Silph Co.
- Nidoran♀ and Nidoran♂ were the first Pokémon to feature gender differences, or even gender at all.
- Despite the addition of genders to most Pokémon starting in Generation II, the two variations of Nidoran remained separate species, rather than a singular species that splits down different evolution paths based on gender.
- An Egg laid by a Nidoran♀ does, however, have a chance of hatching into a Nidoran♂, as well as an Egg laid by a Nidoran♂ with a Ditto has a chance of hatching into a Nidoran♀.
- Nidoran♀ is the only Pokémon that loses the ability to breed upon evolution.
- Nidoran♀'s alternate coloration is similar to Nidoran♂'s normal coloration, and vice versa for Nidoran♂.
- Nidoran♀ shares its category name with Nidorina, Nidoran♂, Nidorino, Poipole, and Naganadel. They are all known as the Poison Pin Pokémon.
- Due to the fact that its gender, ♀, is included in its name, checking Nidoran♀'s summary from Generation II onward will display as if it were genderless if it does not have a nickname. If its nickname is anything other than "Nidoran♀", its gender will appear as normal.
Origin
Nidoran♀ appears to draw inspiration from hamsters, rabbits (perhaps an Amami rabbit, specifically), mice, or porcupines, with aspects of venomous mammals. Anatomically, however, they are arguably most like hyraxes – small, rodent-like mammals that are genetically more closely related to much larger mammals like elephants and manatees featuring thickset bodies with tough hides (similar to Nidorina and Nidoqueen).
Name origin
Nidoran♀ may be derived from needle. It may also come from cnidocyte, a type of venomous cell responsible for the stings delivered by stinging animals, most notably jellyfish. Alternatively, it may be based on 二 ni (two) or 二度 nido (two times/two degrees) referring to the two distinct evolutionary lines with similar names and traits. Also, the Japanese word ran is translated as orchid in English. Orchids are flowers that can be purple or blue, these being the same colors as the male and female evolutionary forms of Nidoran, respectively. The ♀ is an indication of its female gender.