So I was trying to get ahold of a specific nature/ability Murkrow, catching, checking, then resetting, when I noticed an odd little purple box on one of the catches... Needless to say, I'll just breed for a good Murkrow. I'm not sure if this is big news or anything, but I haven't seen anyone say anything about getting Pokerus at all on the forums, so I'd figure I'd share the fact that it exists if you started losing faith.