This may look like other questions that have already been asked, but it's not.
OK, so I traded a few Pokemon with the pokerus over to Y that I caught in white 2. And I've already spread it among my normal in-game team, and I'm trying to spread it among a new team I'm making.
The Pokemon I'm using that has it is Tynamo. What I'm doing is putting tynamo in the front of my party, getting it to use a physical move on a wild Pokemon, switching out to one I want to spread it to, and getting them to use a physical move. I've already done this a few times, but none of them have caught it!
The Tynamo's pokerus is still active. It is the same one I used for the others. Is there anything I'm doing wrong?