Would a Mega TyraniBoah set be viable (when PokéBank releases of course)?
Name: TyraniBoah (Physical Bias)
Item: Tyranitarite
Nature: Quiet/Brave
EVs:252 HP/92 S.Attack/164 Speed
-Substitute
-Focus Punch
-Crunch
-Flamethrower/Ice Beam/Thunderbolt
The aim of this set is to destroy walls, even though they are rather seldom seen in this generation.
This old relic from the advent of R/S/E was generally specially based, destroying Forretress and co left, right and centre. Now however, it take slightly different approach.
With a Quiet nature and NO investment, Flamethrower is a 100% 2HKO against Impish Skarmory, which is pretty amazing actually, however it does fear the Whirlwind. In cases like this, you would be wise to NOT set up a Substitute.
Flamethrower 2HKOs Forretress too, factoring in Sturdy.
Focus Punch, regardless of nature, 2HKOs Goodra. If the Sub breaks after Focus Punch number 1, Crunch will finish the job.
164 EVs with a detrimental nature ensures you outspeed uninvested Modest Goodra, the most common one.
Flamethrower helps you destroy the common Scizor and the surprisingly lesser seen Ferrothorn, Skarmory and Forretress. I personally feel those latter 3 are particularly uncommon in Battle Spot. If that is the case for you as well, Ice Beam is amazing at destroying opposing Garchomp, Dragonite and Salamence. However, this is a WALLBREAKING set, not a sweeper breaking, so do so at your own desire.
Thunderbolt... if you don't mind being outsped by Goodra, invest in 204 S.Attack EVs, this guarantees the 2HKO on Azumarill.
It's not a great set, but helps deal with many common walls. Most important part is the surprise factor; incoming Skarmory for example will fear the toastiness of Flamethrower on the switch THEN struggle to retaliate.