Boo Jack commands as one of Bear King’s lieutenants within the Trump Pirates, operating exclusively in a non-canon narrative. His hybrid design merges porcine traits with card-game symbolism: a bandanna-shaped hat mimicking a boar’s visage, a yellow tunic emblazoned with a "J," and spiked Toge Toge Armor. This armor grants him the ability to launch deadly spikes or morph into a colossal rolling sphere bristling with spikes. He supplements close combat with explosive white orbs hurled as long-range weapons. Arrogant and merciless, Boo Jack enforces Bear King’s dominion with biting mockery and relentless intimidation. He adopts a theatric quizmaster persona, bombarding foes with questions about the next Pirate King while vehemently declaring Bear King as the sole answer—a blend of loyalty to his captain and contempt for rivals like Luffy. In battle, he revels in underhanded tactics, ambushing enemies with concealed explosives or weaponizing environmental dangers like concealed landmines. His overconfidence often undermines his strategies, leaving vulnerabilities opponents exploit. Boo Jack debuts leading a fleet alongside Honey Queen against the Straw Hat Pirates and Thief Brothers. He orchestrates Nami’s abduction to wed Bear King and outmaneuvers Sanji by sabotaging a parasail assault. Their subsequent clash exposes his penchant for taunting adversaries, as he ridicules Sanji’s prior injuries before combat. Sanji turns the tide with a barrage of precision kicks, overwhelming Boo Jack and leaving him battered. After Bear King’s downfall triggers Clockwork Island’s destruction, Boo Jack’s fate remains shrouded in ambiguity. He is last glimpsed unconscious amid the crumbling ruins, with no canonical follow-up in later stories. His narrative arc concludes within the film’s events, absent from expanded lore or supplementary material.