StreetBrawler

No Decepticon is as persistent or dangerous as the Cybertronian called StreetBrawler. Originally part of the Cybertron Intelligence Network, StreetBrawler was known to provide the Autobots with important intelligence during the earliest days of the War for Cybertron. However, during the Battle of Polyhex, StreetBrawler sold out Bumblebee's team to Megatron and the Decepticons. Afterwards StreetBrawler went underground briefly before he resurfaced as a Decepticon. As a soldier in the Decepticon ranks, StreetBrawler was known to stalk his prey before striking, earning a reputation as one of the most feared Transformers. For reasons unknown, StreetBrawler was nearly scrapped by Starscream, under the guise that Megatron ordered him to remain behind when the Decepticons pursued the Autobots off Cybertron. As a result, StreetBrawler abandoned the Decepticons and struck out on his own.

Leaving Cybertron, StreetBrawler travelled the Universe hunting various alien species that he encountered. After nearly three years of travelling, StreetBrawler arrived on Earth where he turned his attention to hunting Humans. This led him to encounter the Human female Tessa Barry, who was under the protection of the Autobot Shockdrop. Though his skills were able to overpower the Autobot, StreetBrawler underestimated Tessa's courage. As a result, his ship was destroyed and left him stranded on Earth. For the next few months, StreetBrawler spent his time studying the Humans and planning his vengeance on Tessa. At one point his search for one of the lost Relics of Iacon brought him into conflict with Shockdrop, Windblade and Slipstream. While the Relic was lost to the Autobots, StreetBrawler was left with the decision to willingly rejoin the Decepticons. With Starscream having been long gone, StreetBrawler found himself bumped up to the position of First Lieutenant. His time as a Decepticon ended in 2005 when the Decepticons were taken over by Starscream, once again driving StreetBrawler to strike out on his own.