Honestly it's really not that difficult to deal with. Pyroar, Simisear, scarfed Typhlosion, Sneasel with Low Kick, and a good number of scarfed mons are easily capable of dealing with it.
As a random thought, a Jolly Guts Swellow can guaranteed OHKO M-Glalie with Facade (252 Atk Guts Swellow...