Wreck-Gar
Wreck-Gar is the name of two characters from the Transformers universes. Both are unpredictable good-aligned characters who provide comic relief in their series.
Transformers: Generation 1
Wreck-Gar is the idiosyncratic leader of the Junkions.
For many years Wreck-Gar was the only Junkion character to have a toy until the e-hobby exclusive character Detritus was released in Japan.
Marvel Comics
While Wreck-Gar and the rest of the movie cast would not make any major appearances in the Marvel U.S. run of the Transformers comic, the Marvel UK version of the comic would make heavy use of Wreck-Gar and the movie cast in order to fill in the gaps between reprinted US material.
Wreck-Gar's first appearance came in the Fallen Angel arc, when he built the time machine enabling Rodimus Prime, Kup and Blurr to travel back to 1987 in pursuit of the former Decepticon leader Galvatron. Stealing away when the device was activated, Wreck-Gar found the remains of Bumblebee (obliterated by Death's Head, a bounty hunter from the future trying to claim a bounty on Galvatron) and rebuilt him into Goldbug. Subsequently taking part in a diversionary assault on Galvatron (and nearly getting scrapped for it), Wreck-Gar subsequently rebuilt Galvatron's time-jump mechanism to return all the time travellers to the future, bar Galvatron, who had modified the mechanism to stay behind.