- Motto: "Boo!"
- Weapon: Black Magic
Sub-group: Monstructor Six
Function: Ground Assault
Alternate Mode: Quadruped Monster
Weapon: Rapid-Fire Electrostatic Pulse Rifle
Height: 26ft / 7.92m
Quote: “You can't tell a Decepticon by its cover."
Tech Skill: 5
Profile: Bristleback is an angry, aggressive complainer who peppers his simple statements with foul language to make any point. He's a natural bully, but his demeanour is made even more repellent by the fact that he secretly despises the slowness and lack of agility offered by his alternate mode, which causes him to lash out at anyone or anything with an indiscriminate rage. Despite being a fearsome warrior capable of holding his own in battle, the constant irritation of thinking about his plodding alternate mode only makes him, during his most foulest moods, even meaner and more argumentative than usual. He feels insecure because of this and longs to function with the great speed and dexterity some of his fellow Decepticons get to enjoy naturally.
Abilities: Bristleback had above-average strength and great endurance. His alternate mode has thick armour that limits motion somewhat. In all modes, the spikes on his back can emit a corrosive acid that can help them cut through materials on contact. In robot mode, Bristleback is armed with a rapid-fire electrostatic pulse rifle that shorts out and can permanently damage enemy circuitry. Combines with fellow Monstercons to merge into Monstructor.
Weaknesses: While in alternate mode, Bristleback is exceptionally slow and lacking in manoeuvrability.