Robot | Alt mode
"Me Grimlock no nice Dino, me bash brains.
Grimlock was created by Wheeljack and Ratchet along with Slag and Sludge. One day mysterious trembles shook the Autobot's Base/ship. Believing the trembles were the cause of Decepticons, they look around their base and found Dinosaur bones. Those bones inspired Wheeljack and Ratchet to create the Dinobots.