Chameleon isn't much of a warrior, but he is a pretty goods spy. He is fairly clever, plus he has the ability to blend into his surroundings, rendering himself practically invisible to normal visual sensors. Sadly, this doesn't work against other forms of detection, like heat vision.
He transforms into a Cybertronic open-topped hover-car.
Marvel UK comics continuity
Chameleon was investigating the potential alliance between the Decepticons in Tyrest and an unknown alien force, but was captured in the process. He was sent to fight for his life in the Jekka Amphitheater against the multi-armed alien Hooligan, and lost. When his remains were found by an Autobot patrol, Ultra Magnus, Fizzle, Sizzle and Guzzle went to investigate his death, uncovering the death-sport-fueled alliance between the Decepticon Firecons and the alien Zabra.