Rockfist grounds his massive energy and faces opponents square on. With reinforced shoulders built to wield his enormous fists, Rockfist packs a punch which lives up his name. The sheer size of this Mechtogan strikes fear into his opponents.
Rockfist made his debut in Triple Threat. He was summoned by Sellon alongside Miserak and Deezall. He fought against Titanium Dragonoid and Zenthon and was doing well until they summoned Zenthon Titan. When the Titan appeared, all three Mechtogan were defeated.