- Grand Galvatron is a hypothetical body from the Headmasters portion of the Generation One continuity family.
Grand Galvatron was to be the pinnacle of Galvatron's lust for Universal domination. Inspired by his once-master Unicron, Grand Galvatron would have been a massive planet-sized sentient war machine forged from the planet Earth as well as the corpses of the most elite warriors within the Decepticon ranks.
- RTM1 dub name: Unicorn (no, that's not a typo)
After surviving the devastation of Cybertron and reclaiming leadership of the Decepticons, Galvatron sent his forces on a campaign to plunder energy all across the galaxy. His true schemes remained a mystery to all those around him, but eventually Scorponok realised that he planned to incorporate the Earth into his system.
Eventually, he revealed to his most trusted warrior, Sixshot, that he intended to use the energy to turn Earth into his new Unicron-sized body and become Grand Galvatron. He also revealed to Sixshot that such a body would require parts from his most powerful and skilled warriors — Sixshot included. This didn't sit well with Sixshot (gee, wonder why), who betrayed Galvatron and left him to battle the Autobot Headmasters alone. Galvatron lost the battle and was buried alive beneath an iceberg by the Headmasters' Head Formation. His dreams of becoming Grand Galvatron were never fulfilled.
- In the RTM 1 dub, while showing his plans to Sixshot, Galvatron proudly proclaims, "This is Unicorn!"