Optimus Prime, Bumblebee and Megatron are some of the more iconic Transformers franchise characters, but the cast extends far beyond this trio. Autobots are the good guys and Decepticons are the bad guys, and each faction also has different groups to consider.
Autobots consist of groups that include Dinobots, Throttlebots and Targetmasters. Examples of famous Autobots include Wheeljack, Prowl, Cliffjumper, Ratchet and Hot Rod, who all regularly appeared on the television show "Transformers" along with Optimus and Bumblebee. The Decepticons also have their own groups within their faction, including the Insecticons, Combaticons and the Stunticons. Soundwave, Starscream and Reflector all shared more screen time than these groups, however.
The franchise includes robot action figures that can transform into cars and vice versa. The toys generally follow the television show, meaning main characters on "Transformers" have toys created after them. Because of this, it's often easier to find better-known characters like Bumblebee or Optimus than minor characters such as Brawl or Lockdown.
Most characters have names that reflect either their personalities, such as the fast-talking Blurr, or the type of vehicles they can transform into. Bumblebee, for example, gets his name from the ability to turn into a Volkswagen Beetle, which was his form when first released in 1984.