mawile spread info:
-1 252+ Atk Landorus-Therian Earthquake vs. 248 HP / 132+ Def Mawile-Mega in Grassy Terrain: 66-78 (21.7 - 25.7%)
252 Atk Dugtrio Earthquake vs. 248 HP / 132+ Def Mawile-Mega in Grassy Terrain: 66-80 (21.7 - 26.4%)
-1 252 Atk Excadrill Iron Head vs. 248 HP / 132+ Def Mawile-Mega: 61-73 (20.1 - 24%)
-1 252+ Atk Scizor-Mega Bullet Punch vs. 248 HP / 132+ Def Mawile-Mega: 55-66 (18.1 - 21.7%)
-1 252+ Atk Landorus-Therian Earthquake vs. 248 HP / 132+ Def Mawile-Mega in Grassy Terrain: 66-78 (21.7 - 25.7%)
252 Atk Dugtrio Earthquake vs. 248 HP / 132+ Def Mawile-Mega in Grassy Terrain: 66-80 (21.7 - 26.4%)
-1 252 Atk Excadrill Iron Head vs. 248 HP / 132+ Def Mawile-Mega: 61-73 (20.1 - 24%)
-1 252+ Atk Scizor-Mega Bullet Punch vs. 248 HP / 132+ Def Mawile-Mega: 55-66 (18.1 - 21.7%)
http://replay.pokemonshowdown.com/gen7nualpha-586184163
Thunder Punch And Drain Punch are both really good depending on match-ups, so I still can't decide which one will come in handy more often. Also not really sure of the best item for this kind of Meowstic. I've been rotating btwn Eject Button, Rocky Helmet, and Terrain Extender.