Grimlock

Grimlock is egomaniacal, impatient and dimwitted, but he is a powerful soldier. Grimlock was a gladiator from Kaon, but chose to join the Autobots early on in the war. His has some issues to work out with Optimus Prime and shock and awe approach to combat meant he was not regarded as a great leader, but he has survived long enough to earn a high rank and command of the Lightning Strike Coalition. After being captured by Shockwave, they were reformatted into the Dinobots. He is good friends with Swoop, Slug, Sludge, & Snarl and wields his prized energon sword in battle.

Biogrpahy
Grimlock is known for not following orders or trusting in Optimus Prime's ability to be an effective leader. As the leader of the Lightning Strike Coalition Force, Grimlock enjoys smashing things first and asking questions later. Due to Shockwave's experiments, Grimlock has been left with a malfunctioning voice processor and an alt-mode inspired by a distant primitive world.

Once he had a veichle mode of a Cybertronian tank, but after being experimented by Shockwave, Grimlock was reformatted with a beast mode of Cybertronian Tyrannosaurus Rex (T-Rex).

Toys
Generations
 * Grimlock (Voyager Class, 2012)
 * Series / number: 1 / 003
 * Japanese ID number: TG19
 * Accessories: Sword, shield
 * Part of the second wave of Generations Voyager Class toys, Fall of Cybertron Grimlock transforms into a robotictyrannosaurus rex. He comes with a sword with a 5mm handle and a peg on either side of the hilt, as well as a shield which can mount via its single peg. Grimlock features 5mm ports for his hands, as well as on his forearms/lower dino legs and shoulders/dino hips. Interestingly, his dinosaur arms feature Cyberverse-compatible3mm ports.
 * His main gimmicks, however, are that he has a light in his dinosaur mouth, and a chomping dinosaur jaw. When a lever behind his dino head is pulled, his mouth opens, and the light turns on, strongly illuminating his head. This gimmick can also be used in robot mode, as his dino head ends up inside his hollow chest, although it's not as effective. The insignia on his chest is the Lightning Strike Coalition variant of the Autobrand.