This just in! I just got traded a Magnemite with the Pokerus! Its nickname is "KANYE WEST", so if you get this Magnemite, be sure to spread that Pokerus as fast as you can, then trade it back to everyone else. I just spread it amongst my team, and gave it to an Azurill that I quickly boxed, and I'm putting it back up on the GTS right now.
If you've never gotten the Pokerus before, now's your chance to catch the fever! ^__^
[EDIT] Oh jeez, I just found another one! Hahahaha, wow! So yeah, the moral of the story is to check your Magnemite if you really want the Pokerus!