Phantom Virus

The Phantom Virus is the main antagonist of Scooby-Doo and the Cyber Chase.
==History==
A laser for transferring material items into the virtual world was mysteriously and improperly used to extract the Phantom Virus into the real world of the university's lab, escaping to the greater campus. There, it would wreak havoc and chaos, starting with attacking Eric.
Once the Mystery Inc. gang are accidentally transferred into the game by accident, they compete with the virus through ten levels and conquer various monsters in different locations within the game. In order to defeat the virus, the gang must find the Scooby Snacks box in each level and progress to the end.
During the final level, which is in a city with a carnival, the Virus assembles the Creeper, Jaguaro, the Gator Ghoul, the Tar Monster, and Old Iron Face (old enemies from Mystery Inc.'s past) to destroy the Mystery gang until the Virus is destroyed when Scooby grabs the last box of Scooby Snacks, along with the monsters he assembled.
It was revealed by clues left by the virus that a student at a university named Bill McLemore made the virus because his baseball video game project was not picked by Professor Kaufman, so he exacted revenge on the Professor and his favored student Eric Staufer (whose video game design was chosen) by creating the Phantom Virus. Bill ends up getting foiled and arrested.