>>38980334>>38980371>>38980424Avalugg can actually check pretty much every Physical Attacker without coverage that hits it Super Effectively. It can even beat Mega Mawile without Iron Head
252+ Atk Huge Power Mawile-Mega Play Rough vs. 252 HP / 168+ Def Avalugg: 135-159 (34.2 - 40.3%) -- guaranteed 3HKO
252+ Atk Huge Power Mawile-Mega Brick Break vs. 252 HP / 168+ Def Avalugg: 150-178 (38 - 45.1%) -- guaranteed 3HKO
88 Atk Avalugg Earthquake vs. 92 HP / 0 Def Mawile-Mega: 146-174 (55.3 - 65.9%) -- guaranteed 2HKO
And Mega Pinsir too
252 Atk Pinsir-Mega Close Combat vs. 252 HP / 168+ Def Avalugg: 146-172 (37 - 43.6%) -- guaranteed 3HKO
88 Atk Avalugg Avalanche vs. 0 HP / 4 Def Pinsir-Mega: 272-324 (100.3 - 119.5%) -- guaranteed OHKO
See
https://www.smogon.com/dex/sm/pokemon/avalugg/ 
