Grimlock

Grimlock is a Cybertronian Autobot who was rebuilt on Earth in the form of a mechanical Tyrannosaurus rex, making him one of the original Dinobots and their fierce, strong-willed leader. Combining immense strength and flame breath with a combative personality, he is one of the most powerful warriors in the Autobot ranks.

Few Transformers have commanded the page quite like Grimlock, who crashed into Marvel Comics in 1984's The Transformers #7 — a Bronze Age debut courtesy of Jim Salicrup and Frank Springer that launched one of the most enduring presences in the entire Transformers mythos. Over four-plus decades of publication, Grimlock has kept extraordinary company, sharing adventures with titans like Optimus Prime, Megatron, Starscream, and Jazz across the flagship Transformers series as well as the transatlantic pages of Action Force Monthly and G.I. Joe European Missions. With a collector-recognized key issue to his name and 57 catalog appearances spanning 1984 all the way to 2025, this is a character whose staying power speaks for itself. Whether you're a longtime fan or just discovering the Marvel era of Transformers lore, Grimlock is absolutely worth tracking down.