Thundercracker serves as a Decepticon lieutenant under Megatron during the Unicron Singularity crisis, excelling in aerial combat with a Sukhoi Su-35 jet alternate mode acquired upon arriving on Earth. Tasked with locating Cyber Planet Keys and sabotaging Autobot operations, he frequently clashes with Optimus Prime and Jetfire in high-stakes confrontations. During a mission in Colorado, he targets Landmine and three human children but is forced to retreat when his missile barrage fails against Optimus Prime’s impervious Super Mode. His allegiance to Megatron wavers amid collaborations with Starscream, whose defection to pursue the Omega Lock sparks internal strife. Thundercracker deploys across worlds like Gigantion, battling Jetfire while hunting for planetary Cyber Planet Keys. In the climactic struggle against Galvatron’s black hole scheme, he fights alongside Decepticon forces but ultimately sees their leader’s downfall and the universe’s restoration. Post-crisis, Thundercracker briefly defects to the Autobots, only to be violently reclaimed by Thunderblast, Ransack, and Crumplezone, leading to his exile on Mars. His duality of loyalty and self-preservation drives him to withdraw from overwhelming odds while persisting as a recurring threat in pivotal battles. Mocking and impulsive, he taunts allies like Megatron yet avoids direct defiance to sidestep retribution. Flawed tactics surface, such as baiting Autobots with a decoy Omega Lock projection only to be outmatched alone. Despite these lapses, he adapts mid-combat, leveraging Cyber Key upgrades to intensify missile assaults. His arc culminates in the Decepticons’ failed conquest of Cybertron’s united colonies. Empowered by the Omega Lock, he duels Optimus Prime in a climactic showdown but falls to combined Autobot might. Stranded on Mars with fellow Decepticon remnants, his story ends unresolved, lingering as a vestige of the faction’s fractured ambitions.