Looker serves as an International Police officer operating across multiple regions. He wears black penny loafers, brown suit pants, a white shirt with a pink tie, a lighter brown vest, and an investigator coat. His appearance features brown eyes, dark hair, wrinkle marks around his mouth, and a naturally inquisitive expression. Personally, he demonstrates investigative creativity and willingly takes risks to uncover vital information. He exhibits care for vulnerable individuals, values friendships formed during missions, and often prioritizes thoughtful analysis over verbal expression. His dedication to combating crime remains constant, though he occasionally displays strictness regarding case protocols. In the Sinnoh region, he investigates Team Galactic's activities. He first encounters Ash and his companions during a disrupted train journey near Lake Acuity, identifying Team Galactic's unauthorized track usage for equipment transport. Subsequent encounters occur at Mt. Coronet, where he infiltrates Team Galactic's underground operations using disguises, including that of a grunt. At the Fuego Ironworks, he triggers a data-erasing trap while examining a gem. He later collaborates with Team Rocket for further infiltration attempts, though they face repeated capture by Commander Jupiter. His Unova assignment focuses on apprehending Team Plasma's Seven Sages. He initially meets Ash's group disguised as a hiker, employing an EM shield to counteract Team Plasma's signal-controlling technology affecting Pikachu and Axew. He involves the group in an observatory investigation targeting Ghetsis and Colress. Later, he tracks Team Plasma to Dragonspiral Tower while posing as an archaeologist. He coordinates with Cedric Juniper regarding the Light Stone, attempts to prevent Reshiram's release, and aids in arresting Team Plasma members after the Colress Machine's destruction. Within the Kalos region, he establishes a detective agency in Lumiose City and recruits the player character as an assistant. During cases, he encounters Emma, a homeless girl with an Espurr named Mimi, and provides her shelter. Emma's subsequent manipulation by Xerosic via a mind-controlling suit leads Looker to intervene, resulting in Xerosic's arrest. Before departing Kalos, he reveals his International Police affiliation to Emma through a letter and transfers his codename to the player character. An amnesic appearance occurs in Hoenn's Battle Resort, where he is found washed ashore. A local woman assists him, and he gifts the player an Audinite while questioning his own identity. In Alola, he investigates Ultra Beasts alongside his superior, Anabel. He reveals past events involving a failed mission ten years prior: alongside Nanu and an unnamed Faller teammate, they attempted to capture Guzzlord. Strategic errors and misplaced sympathy led to the Faller's death. Following this mission, Looker and Nanu discovered an amnesic Anabel on Poni Island's shore. During these events, he operates without a partner Pokémon, referencing the earlier loss of his Croagunk during an unspecified case. His capabilities include proficiency with disguises and specialized investigative gadgets, though these devices occasionally malfunction during critical moments. His background includes a former codename "836" under Nanu's command during his early International Police career.