Transformers: Generation 1
Sunstreaker was one of the first generation of Autobots in the original Transformers television series. He was the twin brother of Sideswipe, another Autobot, and like him also turned into a Lamborghini Countach. His alternate mode however, was yellow and had a modification in the form of an engine that sticks out the back. He was described as the ultimate egotist, being notoriously difficult to work with and pair up with anyone else besides Sideswipe, and described himself as the most beautiful thing ever and Cybertron's greatest warrior. He was also a cold, ruthless and effective fighter who would do anything to win.
Sunstreaker appeared frequently in the animated series as one of the Autobots on Earth, saving Trailbreaker from the Seekers in "More Than Meets the Eye", but had very few prominent roles.
Predictably, given his ego, he was one of several Autobots who appeared as "giant evil aliens" in a Hollywood movie ("Hoist goes Hollywood") alongside Hoist and many others, before ending up battling the Decepticons for real.
Sunstreaker appeared in two places at once in the Transformers movie. Before the Decepticon attack on Autobot City, Sunstreaker was helping Kup move a roadblock. He was knocked over when Hot Rod and Daniel Witwicky drove through it. Meanwhile, he was also on Moon Base One and helped pilot the shuttle that flew Optimus Prime and the Dinobots to Autobot City.
It should be noted that in the IDW Publishing adaption of the Transformers movie they removed Sunstreaker from helping Kup on Earth and only depicted him as being with Prime just after the shuttle landed.
He is one of the few original Autobots to have apparently survived the attack on Autobot City. He unlike his twin Sideswipe had a brief appearance in the movie as the pilot of the shuttle carrying the detachment of Autobot reinforcements to earth. This was his last appearance in the series.