While it's probably not all that great, Doublade has a niche in forcing Facade users out (at least from full health), -ate or otherwise:
252+ Atk Pixilate Mega Altaria Facade (140 BP) vs. 252 HP / 252+ Def Eviolite Doublade: 52-62 (16.1 - 19.2%) -- guaranteed 4HKO after burn damage
0 Atk burned Doublade Gyro Ball (96 BP) vs. 64 HP / 0 Def Mega Altaria: 103-123 (33.5 - 40%) -- guaranteed 3HKO
(Yes, even burned, Doublade does more with Gyro Ball than Flash Cannon)
Altaria can 2HKO at +3, but with Altaria at +1 Speed, Gyro Ball is 2HKOing. Altaria cannot set up on Doublade, nor can it forego setup. I guess it can just sit there and Roost if it has no boosts, but that gives you an opening to send in something to kill it.
Pinsir is a bit more troublesome, as it only needs to hit +2 to 2HKO...:
+2 252+ Atk Aerilate Mega Pinsir Facade (140 BP) vs. 252 HP / 252+ Def Eviolite Doublade: 133-157 (41.3 - 48.7%) -- 78.5% chance to 2HKO after burn damage
0 Atk burned Doublade Rock Slide vs. 0 HP / 0 Def Mega Pinsir: 102-120 (37.6 - 44.2%) -- 1.2% chance to 2HKO after burn damage
... but Doublade can probably handle it.
Glalie is irrelevant:
252+ Atk Refrigerate Mega Glalie Facade (140 BP) vs. 252 HP / 252+ Def Eviolite Doublade: 55-66 (17 - 20.4%) -- guaranteed 4HKO after burn damage
0 Atk burned Doublade Gyro Ball (96 BP) vs. 0 HP / 4 Def Glalie: 135-159 (44.8 - 52.8%) -- guaranteed 2HKO after burn damage
And anything trying to abuse a Normal-type Facade will be laughed at. Doublade's Facade 2HKOs Diggersby, while Diggersby can't claim the same, even after Knocking Off Doublade's Eviolite -- and that's the only mono-Normal attacker that can really touch it.
So yeah, run this with a special wall and Wish support (Chansey comes to mind; so does Clefable) and you should be able to handle Facades headed your way. Is this worth a whole Pokemon? I don't know.