All right, I got it. Hacked my friend his team, but he seems unable to get a signal at the moment that'll maintain a connection.
I read that Rotom's alternate forms aren't usable in the Battle Frontier, and I find that extremely disappointing. I don't want it to be left up to a Stadium type game much later down the road to be able to use them in battles outside of Plat-on-Plat.