Jake Vallory emerges as a human ally to the series’ protagonist in its third season, hailing from Bayview and sharing both Dan’s high school and football team. Headstrong and reliant on raw physical strength early on, he gradually forms a fervent admiration for Dan, dubbing him “Dan the Man” while wrestling with moments of trepidation when faced with Bakugan’s otherworldly threats.

His journey ignites upon plunging into Bakugan Interspace, where he bonds with Subterra Coredem—initially a silent, synthetic Guardian Bakugan that fuels his frustration. Persistence later rewards him with the true Coredem, a communicative partner aligning with his aspirations. Under Julie Makimoto’s mentorship, he evolves from a crushing defeat by Mason Brown to a decisive rematch triumph, refining his brawling tactics.

A darker turn unfolds when Kazarina, a Gundalian scientist, brainwashes him into a hypnotized antagonist. His eyes hollow and demeanor chillingly altered, he infiltrates Neathia to dismantle its defenses, only to be intercepted by Dan and Shun Kazami. Repeated clashes culminate in Coredem shattering his mental chains, enabling Jake to redeem himself by saving Dan from execution and rejoining the Battle Brawlers in their climactic stand against Gundalia.

Emotional vulnerability surfaces as he mourns Coredem’s departure upon returning to Earth, marking a poignant close to their bond. Post-war, he steps back from brawling, resurfacing briefly in a later season’s nostalgic group photo that hints at faded glory.

Jake’s combat legacy spans pivotal team battles against mind-controlled foes and Gundalian operatives like Gill and Airzel, alongside direct duels with brainwashed comrades. His style shifts from mirroring Dan’s brashness to forging unique strategies, despite a mixed record featuring losses and a stalemate against Marucho Marukura. Rock Hammer Battle Gear and his partnership with Subterra Coredem remain defining pillars of his identity.