G-Virus

The G-virus is a very bad thing from the Beast Wars: Uprising portion of the Generation 1 continuity family.

A toxic combination of Dark Energon and the vivisected remnants of the original Galvatron, the terrifying G-virus is an artificially engineered plague like no other. Any Cybertronian infected by the disease slowly transforms into a copy of Galvatron, with all the myriad mental problems that this brings.

Fiction

Beast Wars: Uprising

Following the destruction of Galvatron's forces at the hands of the Human Confederacy, Galvatron was vivisected by Cybertron's best scientists. His remains were used to create the G-virus, which was in turn locked away in Cybertron's Forever Vaults. There it remained for several centuries, until a mercenary team of Predacons led by Bladez stole the virus.

Resistance member Grimlock had masterminded the heist, and planned to detonate a canister of the virus in Tesarus Arena. The transformation would cripple thousands of Builders, leaving them immobile and insane. Before he could carry out his plan, he was confronted by Hot Rod. The two fought; Snapper, the only survivor of Grimlock's squad, planned to go through with Grimlock's plan until Hot Rod told him what the virus was, and the disastrous effects it would have. Snapper chose to destroy the virus, earning him Grimlock's enmity.

Meanwhile, Cop-Tur, sole survivor of the massacre of the Forever Vaults, succumbed to his brief exposure to the virus, mutating into a Galvatron and escaping Micropolis's infirmary.

Uh-oh... Micro-Aggressions