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"Ask Vector Prime" expanded on a comment in Backstop's bio that he was trained by Banzai-Tron and Bludgeon; he met the two while wandering through the cosmos in his youth. Though he accepted their teachings gratefully, Backstop was curious to learn more about the origins of his teachers, who refused to speak of their pasts on Cybertron and Combatron. When Banzai-Tron joined the AllSpark, Backstop left the grieving Bludgeon, and after a lengthy journey returned home to Animatros. Later, he would return to Klo to visit Bludgeon and inform him of the peace that had come to Cybertron, leading the ancient warrior to return to their ancestral planet where he lived out the remainder of his life. 
- 'Universe 2.0 Backstop (2008)