SKUXXOIDS

Skuxxoids are an intelligent reptilian species that often sell their services to the highest bidder as mercenaries for credits. They have scaly skin and stand from 4 to 5 meters high. Skuxxoids have been known to be hired by Quintessons ("Five Faces of Darkness, Part 1 & 2) and Cybertornian Dececpticons (Chaos, Starscream's Ghost, Grimlock's New Brain). They tend to use large asteroid ships as their primary mode of transport and it is quite probable that most of their technological advancement came from scavenging or trading their serivice against tehcnological upgrades.
Source: The Transformers animated series