When Grimlock and all of his other Autobot comrades went to war against the Decepticons, it was their duty to keep the source of life for the Autobots and the Decepticons, AllSpark, safe from the reach of the Decepticons. But then, when Optimus sent AllSpark away from Cybertron, he set out with a few of his friends aboard the Autobots ship, Ark, in search of AllSpark around the universe. And when Ark arrived on Earth in prehistoric times, he ended up outside the Ark trying to save Bumblebee while the Ark was on a collision course, and when he ended up on Earth, he searched the Ark for thousands of cycles, but he found only parts of the Ark from across the Earth. And when Ark was not found, he decided to show his dinosaur lovers the benefits of Autobot civilization, and together they built Ark's command center, and then his search attempts were interrupted when an asteroid collided with Earth and killed the dinosaurs, and at the same time he went to sleep. But then when Windblade found his signal, she went with Bumblebee and Teletraan-X to look for him, and when he was awakened, he began to be reckless, but then he returned to himself. And when Shockwave and Shadow Striker arrived on Earth and began an attempt with the Seekers to destroy the Earth, he and his friends began an attempt to thwart their intentions, and they managed to thwart the intentions of Shadow Striker, Slipstream, Thundercracker, and Nova Storm by destroying their ship. He then showed his friends a map of the Earth it looked like the day the Ark fell to Earth, and Teletraan-X concluded from the map that the Ark was buried in the U.S. part of nature, and there they went to look for the Ark, albeit on the way they had to take care of the Decepticons trying to stop them. and destroy the Ark and all the Autobots sleeping inside it. And they managed to resurrect Optimus and all the Autobots, and after the Decepticon Armada arrived on Earth, he and his other Autobot comrades continued to fight the Decepticons in an attempt to defend the Earth and its inhabitants from the Decepticons. Then later he and the other Autobots left for Cybertron, and there they continued to fight the Decepticons. Then when Megatron brought the Perfect Decepticons from another dimension, he and the other Autobots tried to repel them and save Windblade as well, and succeeded in defeating Megatron X and the Perfect Decepticons and rescuing Windblade and Cybertron.
Powers and Abilities
Grimlock knows how to use his own brute strength, and when he’s in dinosaur form, he can throw fire out of his mouth in that form.
Grimlock and Bumblebee travel to the North Pole inside the plane
Grimlock learned that the Decepticon armada had entered the Earth's star system