Seeing as the two persons who reserved Mega Sableye still don't have done it - even though it was a maximum of 6h. The curse of Sableye ends here.
Reserving Counter: Sableye-Mega
Sableye @ Sablenite
Ability: Prankster
EVs: 248 HP / 116 Def / 144 SpD
Careful Nature
- Metal Burst
- Knock Off
- Will-O-Wisp
- Recover
(I need 30 minutes to finish)
This is the classic utility set, but with Metal Burst in place of Protect in order to abuse Recover against a slow/burned/passive threat and dish out some damage with Metal Burst when your HP is refilled.
252+ Atk Pure Power Medicham-Mega Bullet Punch vs. 252 HP / 112 Def Sableye-Mega: 61-72 (20 - 23.6%) -- guaranteed 5HKO
252+ Atk Pure Power Medicham-Mega Ice/Thunder Punch vs. 252 HP / 112 Def Sableye-Mega: 113-133 (37.1 - 43.7%) -- guaranteed 3HKO
This is a 3HKO without burns, so the change onto Spe mechanic when megaevolving isn't detrimental here.
Sableye is immune to Normal, Psychic and Fighting moves thanks to its typing and can stomach 2 Ice/Thunder Punches bar crits.
252+ Atk Pure Power Medicham-Mega Thunder Punch vs. 252 HP / 112 Def Sableye-Mega in Electric Terrain: 169-199 (55.5 - 65.4%) -- guaranteed 2HKO
Keep in mind that Electric Terrain helps Mega Medicham a lot, but Sableye can win 1 vs 1.
It is way safer to not switch directly onto Mega Medicham, because in this generation Mega Sableye can't use Prankster burn when megaevolving. But see this:
252+ Atk Pure Power burned Medicham-Mega Thunder Punch vs. 252 HP / 112 Def Sableye in Electric Terrain: 124-146 (40.7 - 48%) -- guaranteed 3HKO
252+ Atk Pure Power burned Medicham-Mega Thunder Punch vs. 252 HP / 112 Def Sableye-Mega in Electric Terrain: 84-99 (27.6 - 32.5%) -- guaranteed 4HKO
You can choose to not Mega evolve and you are "bulkier" thanks to the prankster WoW, then you Megaevolve your Ghost while clicking Recover.
This is the best scenario possible, because a prankster WoW makes all the difference.