Officer Jenny belongs to a widespread family of police officers, all sharing identical appearances and the same name. Multiple individuals bearing this name and uniform serve across the Sinnoh region, distinguishable only by minor badge variations on their hats. Brock consistently identifies specific Jennys despite their identical looks. Physically, Sinnoh's Officer Jennys typically possess dark teal hair and fair skin, with potential slight variations in hair shade or skin tone. Their standardized uniform includes a purple cap with a black rim, red top, and gold star insignia; a purple collared shirt featuring red trim; a sky blue chestpiece; gold shoulder pads; a black purse; a matching belt with a gold buckle; a purple skirt; black high heels; and white gloves. This attire remains consistent throughout their Sinnoh appearances. Her duties involve maintaining public order, investigating crimes, and assisting trainers. She first appears in Sandgem Town, aiding Ash Ketchum in locating his missing Pikachu and escorting him to Professor Rowan's laboratory during a multi-party search. Later, in Jubilife City, she investigates Team Rocket's theft of machine parts from a factory, clarifying to Dawn that multiple Officer Jennys exist across regions, similar to the Nurse Joy family. She also serves as a judge alongside Mr. Sukizo and Nurse Joy during Hearthome City's Pokémon Dress-Up Contest, evaluating participant costumes and performances. Her primary Sinnoh partner Pokémon is Growlithe, utilized for tracking, apprehending suspects, and combat support. Growlithe participates in a staged Sinnoh Pokémon Hustle event orchestrated by Team Rocket, battling and defeating a criminal's Drowzee to aid in the arrest of perpetrators Crimson and Azure, reflecting its consistent role as her signature police Pokémon. A younger relative named Marble, also an Officer Jenny, appears briefly with a Luxray partner that initially struggles with electric-type moves. She displays professional competence in investigations, such as pursuing a Team Rocket-utilized Drowzee causing Pokémon disobedience in an earlier region. She demonstrates knowledge of Team Rocket's long-term pursuit of Ash Ketchum, having tracked their activities since the Viridian City incident. Her role remains strictly focused on law enforcement, with no significant personal backstory or character development detailed in the series.