AshK

There are multiple ways to screw up baton passing teams. Using a Pokemon who can use Roar/Whirlwind is one such method. Setting up stealth rock to mess up Ninjask or using a fast taunter like Gliscor can also help. And using the move Perish Song is a foolproof way to deal with this strategy unless he has mr. mime which is unlikely. Setting up toxic spikes is also a great way to stop them. Finally tricking choice items to some key mon in the chain can also mess it up. Smeargle can be easily massacred with something like Lucario and Conkeldurr.

Since you are talking about "2 Eveelutions", I assume that your rival team might have Espeon, in which scenario some of these strategies will fail. Espeon + baton pass has been repeatedly nominated as suspect at smogon, since there is next to no way to stop espeon apart from crits. The key is to keep up the pressure because I have myself been swept by Ninjask + Baton pass. The user 2NE1 once used it against it me with devastating impact.

thanks for the advice! I shall try these things.