Last night I restarted my copy of platinum, because although I beat the league in five days the first time, I thought I could build a better team. Anyway, fast forward to eterna forest. In the forset I planned to catch a hoothoot and a rotom (my team at that point was just prinplup and my hm slave bidoof). On the way through I caught my hoothoot and trained it some. Upon reaching the pokecenter in eterna city, I'm told by nurse joy that my team has pokerus. This the second time I've ever had it and the first time since learning what it was and did.