The Nostalgic Virus is a meme made by Sonic used for when someone has an extremely unhealthy obsession with a nostalgic feature, usually an old and now dead video game or TV show. Sonic also has claimed that this virus is apparently uncureable. Sonic proably has the biggest nostalgic virus, having a rather unhealthy obsession with classic Nickelodeon and Cartoon Network, aswell as the rather obscure game ClayFighter, as shown in multiple bouts on the IRC.