Officer Jenny is the shared name given to the many police officers who serve in the Pokémon anime universe. Rather than being a single character, Officer Jenny refers to an enormous family of female police officers, all of whom look nearly identical and are related to one another as cousins. Because they resemble each other so closely and appear in cities throughout the world, travelers often assume they are meeting the same person again, only to be corrected. The name is used for every member of this family, and each Jenny carries out police work in her assigned town or region.

The Officer Jennys share a consistent appearance, typically having blue-green hair, white gloves, and a blue police uniform. Small differences exist between individual officers, such as variations in their hats, badges, and uniform details, and these differences become more noticeable across regions. The Jennys of the Orange Islands wear a different color scheme, while those in Unova, Kalos, and Alola have distinct uniforms and even slightly different looks. In later appearances, the design of the Kanto Jennys was also refreshed.

In terms of personality, Officer Jenny is portrayed as brave, law-abiding, and dedicated to maintaining peace and order. The Jennys are determined to catch criminals, protect citizens and Pokémon, and uphold the law, often at personal risk. While they are earnest and capable, they are not always successful on their own, and some villains, particularly members of Team Rocket, frequently escape or overpower them until outside help arrives. Regardless, each Jenny remains committed to her duty and continues her work without hesitation.

The primary motivation of Officer Jenny is to serve as the police force of the Pokémon world. She investigates crimes, pursues thieves and poachers, protects travelers, and responds to emergencies. Her duties go beyond simple arrests, as some Jennys are shown aiding communities in practical ways. The recurring Kanto Jenny, for example, took in a group of troublesome Squirtle and trained them to become a firefighting crew, showing a desire to reform troublemakers and use Pokémon for the public good. Across the series, the Jennys oppose Team Rocket and other criminal organizations, including Team Aqua, Team Magma, Team Galactic, Team Plasma, and Team Flare, as well as poachers such as Hunter J.

In the story, Officer Jenny serves as a recurring ally and supporting character. She frequently crosses paths with the main protagonists and works alongside them when dangerous situations arise. Although she can be strict and authoritative, she cooperates with the heroes and treats them as trustworthy partners in stopping villains. Her main counterpart in the anime's recurring cast is Nurse Joy, who heads a similarly identical family of Pokémon Center nurses, and the two families operate as parallel institutions within the world. Among the main characters, Brock is notable for being able to tell individual Jennys apart through subtle differences in their behavior, something most people cannot do.

The development of Officer Jenny is mostly shown through the changing regions and eras of the anime. Each new saga tends to introduce a new variant of Jenny with a fresh uniform and a different regional partner Pokémon, reflecting the local wildlife and culture. This allows the character concept to evolve while remaining recognizable. The Alola Jenny, for instance, formed a partnership with a Gumshoos after admiring its sharp teeth, and that Pokémon agreed to join her as her partner. These regional variations show that while all Jennys share the same name and general role, each one has her own experiences and bonds.

Officer Jenny's notable abilities center on police work supported by Pokémon. Her most common partners are Growlithe and Arcanine, which serve as police dogs used for tracking, searching, and apprehending suspects. Different regions feature different partners: the Unova Jennys commonly use Herdier, with some also assisted by Swanna and Duosion, while the Kalos Jenny uses Manectric and the Alola Jenny uses Gumshoos. Individual Jennys have also been shown with other Pokémon suited to specific investigations, such as a Gastly that helped solve a case on Mandarin Island. Their uniforms, badges, and methods may differ, but every Officer Jenny shares the same mission of using Pokémon to protect the peace of the world.