in a junkyard, Max discovers Atom, an obsolete, dilapidated but mostly intact sparring robot designed to withstand severe damage, with a rare "shadow function" to mirror and memorize handler or opponent movements. At Max's behest, Charlie pits Atom against another robot Metro and is surprisingly victorious. Max integrates Noisy Boy's voice command hardware with Atom and convinces Charlie to assist in streamlining Atom's movements. This results in a series of victories, culminating in Charlie being offered a World Robot Boxing fight with Atom against national champion robot Twin Cities. The fight starts with Atom on the attack, but Twin Cities easily takes the offensive. Charlie notices a hitch whenever Twin Cities throws a right punch, and he exploits this to win by knockout. Elated by their success, Max challenges undefeated global champion robot Zeus, with the audience squarely on their side. After the fight, Ricky and two henchmen attack Charlie for bailing earlier and rob him and Max of their winnings, prompting a defeated and dejected Charlie to return Max to Debra. This upsets Max, and when Charlie tries to convince Max that it's better to live without him, Max reveals that all he wanted was for Charlie to fight for him and be there as a father. After Max leaves, Charlie returns to Tallet's Gym and talks with Bailey about the events, where the two kiss, revealing their attraction to each other. Persuaded by Bailey, Charlie reconciles with Max and convinces Debra to allow Max to witness the fight with Zeus that Charlie has arranged. Later on, when the fight begins, Zeus knocks Atom down with its first punch and dominates the first round, but Atom manages to survive the first round, stunning the audience. Ricky, who bet $100,000 with Finn on Atom losing within the first round, tries to leave but is cornered by Finn and his fight bookmakers. As the fight continues, Atom lands multiple punches and withstands further attacks but makes no definitive progress. Late in the fourth round, Atom's voice-response controls are damaged, forcing Charlie to fight Zeus with Atom's shadow function. In the fifth and final round, Atom wards off Zeus long enough to deplete its power core, at which point Charlie directs Atom to begin its counterattack against a tired and helpless Zeus. With Zeus's programmers unable to compensate, the designer, Tak Mashido, intervenes and controls Zeus manually. Atom gives Zeus a sound