I'm not quite sure in Deoxys is supposed to be based of Missingno. or not. Even my Jirachi-is based-off-the-Beanstar theory manages to mak more sense then that.--Pokencyclopedia 13:33, 6 September 2005 (CDT)
"How do you obtain Deoxys? Where is it? Also, how do you obtain Jirachi or Mew?" Deoxys requires the ticket(forgot the name). On an island. Jirachi is the Colo bonus disk. Mew requires the old sea chart.
IMO, I think Deoxys is based on it's namesake, DNA. or else viruses, with are just coated proteins like DNA.