Jackshot, identified as Overhaul in other continuities, serves as an Autobot warrior. His history involves participation alongside Optimus Prime in significant conflicts like the Unicron Battles and Powerlinx Battles, likely extending further back. He possesses an inherent loyalty to the Autobot cause but prefers solitary operations. This stems from past experiences where fellow Autobots perceived him as reckless, leading to social isolation and a drive to prove self-sufficiency. A critical incident during a Decepticon skirmish saw him charge without support, becoming trapped under debris. Optimus Prime intervened personally, defended the position, and apologized for delayed assistance. This act fostered profound respect and solidified unwavering loyalty to Optimus Prime. When the Unicron Singularity threatened Cybertron, Jackshot joined Optimus Prime's unit evacuating to Earth to locate the Cyber Planet Keys. During Earth operations, he contributed to base construction, applying stealth coating for concealment. His direct, confrontational approach sometimes hindered diplomacy, exemplified when demanding the Cyber Planet Key from the Jungle Planet ruler Scourge escalated into conflict. Following the discovery of coordinates pointing to the Jungle Planet (Animatros), Jackshot and Landmine were dispatched through a dimensional portal. Thundercracker's interference prevented Landmine from following, stranding Jackshot alone. An immediate geological event caused a fall into a fissure, resulting in significant systems damage. Rescued and befriended by the Jungle Planet native Backstop, Jackshot learned Megatron had allied with Scourge. Against advice, he directly challenged Scourge for the Cyber Planet Key and suffered severe defeat. Snarl intervened to prevent his destruction, revealing himself as an Autobot ally within Scourge's ranks. Seeking strength, Jackshot underwent self-imposed training within a volcano, tempering himself against extreme heat to withstand Scourge's fire-based attacks. During a subsequent rematch after he defeated Scourge's subordinates Undermine and Brimstone, Megatron interfered, throwing the injured Snarl at Jackshot. As Scourge attacked the helpless Snarl, Jackshot shielded him, triggering a reaction from one of the planetary totems linked to the Cyber Planet Key. This energy transformed him into a new, bestial form known as Ligerjack (Leobreaker in other continuities). This physical transformation amplified his assertive nature while diminishing his independent streak. Ligerjack formed a fast friendship with Snarl and gained Mini-Con attendants. A newfound appreciation for Earth team sports like baseball emerged, potentially serving as a substitute for warfare. This focus on teamwork introduced complexity regarding his combined form with Optimus Prime, Savage Claw Mode. He harbored some resentment that this combination might be less powerful than Optimus Prime's Sonic Wing Mode with Wing Saber. His bond with Snarl deepened; they shared histories and reconciled after moments of frustration, particularly following an incident where impatience during a combined assault on Scourge led to separation and individual defeat. Scourge, acknowledging his honorable combat, prevented Megatron from finishing him off. Ligerjack's capabilities expanded significantly with the ability to combine with Optimus Prime into Savage Claw Mode. This combined form engaged Megatron on multiple occasions, including battles on Velocitron to protect the Planet Cup and on the Jungle Planet against Decepticons like Ransack and Crumplezone. He also protected human allies like Lori from Scourge. The combination tactic involved Ligerjack forming an arm component, though variations occurred, such as reforming the combination after separation during combat using Ligerjack as the opposite arm.