I think when you checked him on his summary, the Pokerus spread from your other pokemon in your party.
Platinum FC- 4898 2333 5211Looking for Smogon Redis. Pokemon
I can also clone ( Only rule is no egg collats. please )
I have the new Redis. Entei and new Exeguttor* I have Conal's Togepi with Redis. Rights *
Rights-Danoziami Shiny Flawless Abra and Beldum