Grimlock [SEP] present in work
to unleash a flow of lava that engulfs all six Transformers until they were uncovered by human paleontologists in 2006.
Following this, Skywatch, a government agency who knew about Transformers, took over the site. Later, following escalating Transformer activity on Earth (as seen in ""), and losing control of their other captive Transformers Ravage and Laserbeak, Skywatch reactivated Grimlock as a response. The reawakening was sabotaged by the Machination, and Grimlock escaped. He met Scorponok, who proposed an alliance as they were both now fugitives
work on his Geothermal Generator, which used the heat from the volcano the Ark had crashed in to generate energon cubes. Although Wheeljack thought this would impress Grimlock by reducing their dependence on human help, Grimlock seemed to think the Autobots should just take what they need from the humans.
In issue #36, Wheeljack called his old friend Sky Lynx for help in order to save a group of human kids from Grimlock. Grimlock attempted to use the children as blackmail against Blaster, who was defecting from the Autobots. Shortly