Grimlock's New Brain - S3.E24

Grimlock becomes a genius after trying to stop anti-electrons (released by Scukzoid and Slizardo) from causing disruptions in the new power generator. This proves very useful to the Autobots, especially when Grimlock learns Unicron is the source of the anti-electrons. The Autobots journey to Unicron to prevent more anti-electrons from being obtained, but Galvatron and his forces are also heading that way.