Bumblebee Transformer

After some smaller roles showing new Autobot recruits around and searching for Decepticon activity, Bumblebee took the spotlight again when he came to question his usefulness to the Autobots, and abandoned them without explanation. Unfortunately, this occurred just as Decepticon leader Shockwave had targeted Bumblebee as the weakest link in the Autobots, planning to mind-control him and use him against his comrades. Taking refuge from Decepticon pursuit in a used car lot, Bumblebee was subsequently stolen by two teenagers, who took him on a joyride through the city. This attracted the attention of both Autobots and Decepticons, and after saving the teens from a Decepticon attack, Bumblebee himself was saved from them by the Autobots, convincing him of his worth to them.
When Bumblebee was assigned to watch over the launch of the mobile Power Station Alpha, also guarded by the daring special mission force G.I. Joe, a Decepticon attack prompted him to transform in order to save a civilian boy, only for the Joes to mistake him for a Decepticon and open fire, destroying him. Learning of their mistake and allying with the Autobots, the Joes set about trying to rebuild Bumblebee; with the aid of Autobot medic Ratchet, Bumblebee was reconstructed as Goldbug.
Charged with hunting down the petty criminal known as the Mechanic, who had stolen some Autobot equipment, Goldbug and Blaster opted instead to remove themselves from the tyrannical command of then-leader Grimlock. A run-in with the Decepticon Triple Changers led to both robots becoming infected with the metal-eating disease known as the Scraplets, but with the help of human Charlie Fong and the Autobot Throttlebots, a cure was found in the form of water, and they were saved. Their respite was short-lived, however, when the group, low on fuel, was caught up to by the Protectobots, under Grimlock's command, and Blaster was captured. The abandoned, immobile Throttlebots, including Goldbug, were then captured by the government-sponsored Rapid Anti-robot Assault Team (RAAT), who intended their destruction. Sympathetic to their plight, RAAT operate Walter Barnett removed their brain components and installed them in toy cars while their bodies were destroyed.
After managing to escape the Predacons, Goldbug returned to the Autobots' volcano base, only to discover that the Ark had been restored and had blasted off. Blindsided by Decepticon leader Ratbat, Goldbug's toy body was blasted, but soon found by the Autobot Headmasters - freshly arrived from the planet Nebulos - who used their technology to construct his body for him again. The group soon learned that the brain patterns of Optimus Prime (who had died sometime before) had been preserved on computer disk by a human named Ethan Zachary, and Goldbug took the disk to Nebulos, where Prime was restored to life as a Powermaster.