The Virus is an evil submicroscopic infectious agent that made Cyborg hungry, destroying Jump City, and thinking there was food everywhere in the episode "Crash".
Character history[]
When Beast Boy accidentally mistook Cyborg's recharger for a video game system, Cyborg hooks himself up to it and the virus took control of him, developing its core in Cyborg's brain. The virus resulted in unusual symptoms on Cyborg, making him see everything around him as food and eat it.
As Gizmo and Beast Boy (as an amoeba) traverse through Cyborg's body to reach the brain, the virus core deployed multiple drones to try stop them. While Gizmo was unable to destroy the virus (even attempted shutting Cyborg down entirely), Beast Boy does so by multiplying himself, overloading the core.