User blog comment:Storm Ninja/Resident Evil Parrody Ideas/@comment-1823154-20101006224040

I think the X-Virus slightly parodies the T-Virus. Either that, or it could possibly be the same X-Virus from Digimon. They do look similar though, since X creatures are supposed to have an X at the end of their name (not in the front or the middle, just the end. Speeddasher X is an example of what I mean)

I've seen the movies, but haven't played the games. It's the same concept with a few differences, really.