Poliwrath @ Roseli Berry
Ability: Water Absorb
EVs: 248 HP / 252 Atk / 8 Spe
Adamant Nature
- Earthquake
- Drain Punch
- Bulk Up
- Encore
Roseli allows you to bulk up on Mawile and kill with EQ after a small amount of chip. If Mawile SD's you can encore and bulk up more.
Calc:
252+ Atk Huge Power Mawile-Mega Play Rough vs. +1 248 HP / 0 Def Roseli Berry Poliwrath: 195-229 (50.9 - 59.7%) -- guaranteed 2HKO
252+ Atk Huge Power Mawile-Mega Thunder Punch vs. +1 248 HP / 0 Def Poliwrath: 216-256 (56.3 - 66.8%) -- guaranteed 2HKO
+1 252+ Atk Poliwrath Earthquake vs. 92 HP / 0 Def Mawile-Mega: 238-282 (90.1 - 106.8%) -- 43.8% chance to OHKO
If M-Mawile switches into unboosted EQ it gets 2HKO'd:
252+ Atk Poliwrath Earthquake vs. 92 HP / 0 Def Mawile-Mega: 160-190 (60.6 - 71.9%) -- guaranteed 2HKO
If it switches into EQ before mega-evolving it's an almost guaranteed 2HKO:
-1 252+ Atk Poliwrath Earthquake vs. 92 HP / 0 Def Mawile: 148-176 (56 - 66.6%) -- guaranteed 2HKO
-1 252+ Atk Poliwrath Earthquake vs. 92 HP / 0 Def Mawile-Mega: 106-126 (40.1 - 47.7%) -- guaranteed 3HKO
Gren can be freely switched into and gets OHKO'd by drain punch:
252 SpA Choice Specs Greninja-Ash Dark Pulse vs. 248 HP / 0 SpD Poliwrath: 120-142 (31.3 - 37%)
252+ Atk Poliwrath Drain Punch vs. 0 HP / 0 Def Greninja-Ash: 302-356 (105.9 - 124.9%) -- guaranteed OHKO