The Iron-Masked Marauder, a high-ranking Team Rocket executive known by the alias "Mask," operates concealed behind a signature metallic faceplate integral to his equipment. His singular objective is capturing the mythical Pokémon Celebi to exploit its dominion over nature and time-travel abilities. To achieve this, he wields specialized Dark Balls, devices capable of forcibly overriding a Pokémon's loyalty and nature, inducing heightened aggression and augmented power under his absolute control. He demonstrates this by seizing a poacher's Tyranitar with a Dark Ball, compelling the poacher to reveal Celebi's location through intimidation. His methodology combines this technology with advanced gear: a spider-legged mechanized vehicle generating defensive barriers and deploying articulated, electrified claws for capture and subjugation, and a concealed jetpack integrated into his attire for rapid aerial mobility. Though personally proficient in physical combat, his balance is notably poor. His field team comprises Pokémon controlled exclusively through Dark Balls: a Scizor using Double Team and Quick Attack, a Sneasel employing Slash, and the corrupted Tyranitar deploying Hyper Beam. While presenting his mission as fulfilling Team Rocket goals for Giovanni, the Marauder's true ambition is leveraging Celebi's power to assassinate Giovanni and usurp control of the organization, subsequently pursuing global domination. This extreme treachery horrifies even the typically amoral operatives Jessie, James, and Meowth, isolating him further. Key actions in his pursuit include coercing an elderly poacher via property destruction by corrupted Tyranitar; deploying Sneasel and Scizor against Celebi's protectors (both defeated and abandoned); successfully capturing Celebi with his mechanized claws, subjecting it to electrocution before Dark Ball containment; forcing the brainwashed Celebi to construct a colossal, destructive entity from forest matter to ravage the ecosystem and attack adversaries; and attempting to capture Suicune using corrupted Tyranitar during the ensuing chaos. His downfall begins when Celebi resists the Dark Ball's influence after emotional intervention, shattering the device and collapsing the constructed entity. Thrown into the Lake of Life, he resurfaces for a final abduction attempt using his jetpack. Ash and Pikachu intercept; Pikachu's Thunderbolt detonates the jetpack during ascent. While Celebi rescues Ash and Pikachu, the Marauder plummets uncontrollably into the forest canopy. The impact dislodges his mask and scatters his remaining Dark Balls. Confronted by enraged forest Pokémon and human witnesses, he pleads for mercy, claiming misunderstanding. The Pokémon subdue him using String Shot before human authorities presumably take custody. His explicit betrayal of Giovanni makes organizational intervention securing his release improbable, implying permanent incarceration. A brief reappearance occurs in archival footage within a subsequent film's montage sequence. His legacy manifests through thematic parallels to later antagonists employing similar Pokémon-subjugation technologies.