Yeah, I haven't touched this post in a while. These sets are pre-Pokebank sets, so holy shit they're outdated.
I'm going to update the OP with relevant shit (especially SD + 3 Attacks, which is better now since it can run Knock Off and Play Rough on the same set now)
In that case, not really, but Baton Pass might be a thing. Probably only effective against Stall and Balance, but Swords Dancing then Baton Passing when a Clefable comes in may be helpful. I think it might be more effective now than it was in XY.
Absol @ Absolite
Ability: Justified
EVs: 32 HP / 252 Atk / 228 Spe
Jolly Nature
- Swords Dance
- Baton Pass
- Sucker Punch/Knock Off
- Play Rough
Probably best off with 4 Attacks though.
I'd at least run Knock Off on any given SD Mega Absol set (I personally wouldn't use Mega Absol without Knock Off ever, though I can see why some sets might want to use something else.) Baton Pass is definitely viable on SD Mega Absol, but SD/Sucker Punch/Knock Off/Baton Pass would be preferred. Sucker Punch is too good to give up, Knock Off is too good to give up... Mono-Dark coverage doesn't hurt that much since you'll just be passing to a teammate against anything that resists mono-Dark coverage. Like, Sylv just came in? Just Pass your boosts to Talonflame, and let's be honest, you've probably got Talonflame on your team if you're using Mega Absol. Tyranitar? Pass them to a Fighting-type. Fighting-type came in? Again, you're probably safe passing your boosts to Talonflame.