Forty years before the events of the fourth Pokémon film, the figure known as Hunter relentlessly tracked the mythical Celebi through a forest. He deployed Scyther and Houndoom to hunt the creature, utilizing unorthodox trapping devices resembling molecular structures instead of standard Poké Balls. During this pursuit, a young boy named Sammy intervened to shield Celebi. Hunter confronted Sammy, demanding he relinquish the Pokémon, but Celebi escaped through time travel, taking Sammy along.  
Decades later, an elderly and infirm Hunter resided near that same forest, possessing a collection of captured Pokémon: Tyranitar, Ursaring, Furret, Teddiursa, Stantler, and Oddish. The Iron Masked Marauder, a Team Rocket operative, confronted him for information on Celebi’s past. When Hunter refused, the Marauder demonstrated a specialized Dark Ball by seizing Hunter’s Tyranitar. The Dark Ball instantly amplified Tyranitar’s power to its maximum potential while corrupting its behavior, rendering it violently aggressive. Under the Marauder’s command, the corrupted Tyranitar obliterated Hunter’s home and possessions with Hyper Beam. Faced with this devastation, Hunter yielded and disclosed Celebi’s historical whereabouts.  
After Tyranitar’s rampage destroyed Hunter’s property, his remaining Pokémon broke free from their cages. These liberated Pokémon later united with the forest’s wild Pokémon to oppose the Iron Masked Marauder. Hunter made no further appearances in the film, and his ultimate fate was not revealed. He does not appear in any other Pokémon media.