Spike Witwicky has been involved with Transformers longer than he can remember. Completely at ease with the Autobots and thought of as one of them. Close friends with the Autobot Bumblebee, whom he has known since childhood.
Spike Witwicky, born in 1969, has been a player in the events of the Transformers for over forty years. He had the misfortune of being one of the first-ever humans to encounter the Decepticons while working with his late father on an oil rig in 1984 that the Decepticons attacked shortly after they emerged from their dormant statis. Upon being rescued by the Autobots, Spike and his father joined with them, providing the Autobots with their knowledge of Earth. Spike would continue to reside with the Autobots for the next forty years.
In 1985, Spike met his future wife, Carolyn "Carly" DeMarr, at a video arcade, when the latter introduced herself to Spike and Bumblebee. Spike would later wed Carly while the latter was a doctoral student at MIT and have a son, Daniel, in 1993.
The Decepticon threat continued to grow at the turn of the century, cumulating in Megatron's absolute conquest of Cybertron. During this time, Spike worked more closely with the Autobots, eventually moving full-time to one of their bases on Cybertron's second moon. He narrowly escaped death when the giant planet-eater Unicron destroyed the moon in 2005.
Following the reconquest of Cybertron by the Autobots, Spike continued to reside on Cybertron as a representative of Earth. When the Decepticons launched their "Final Offensive" against Cybertron and Earth in 2007, Spike continued to fight on the sides of the Autobots. Following this war and the EDC's subsequent resolution to sever all Earth-Cybertron contact, Spike and his family chose to remain on Cybertron with his Autobot friends, even though it would mean never returning to the planet of his birth.
Spike walks with a limp in his left leg, the result of an injury sustained in battle. His advancing years are, privately, a source of some consternation to his Autobot friends, especially his old friend Bumblebee, as the concept of aging is foreign to the Autobots. Spike himself would insist that he's in perfect health.
