Oh fuck
I never ever ever ever ever want to face that
which means I will definitely face that
Better make sure I have a Pokemon with Taunt
If you see a Smeargle, aim for it with both Pokémon and pray you're faster. That's what I do.
At Nationals, I battled a Dark Void Smeargle team. Managed to handle it with ease. Though that is because Dark Void, luckily, missed in the first turn as I was Trick Rooming.