Very minor but since Avalugg was brought was brought up in the VR thread once more and it's still ranked, the
listed analysis has 88 Attack EVs for the purpose of OHKOing Mega Pinsir post-Mega with an unboosted Avalanche. Thing is, the item listed is Rocky Helmet, and even with 0 Attack investment, Avalugg has a 62.5% chance to OHKO Mega Pinsir, which combined with Rocky Helmet chip is...always (since +2 Earthquake bounces off).
Even with 0 Attack investment, you don't miss out on 2HKO'ing Mega Mawile with EQ, and about the only notable thing the 88 Attack EVs does is raise your chance of OHKOing the defensive Lefties Landorus-T set with Avalanche from 50% to 87.5%.
Meanwhile, with 252/252 investment, Mega Medicham's Fake Out+HJK turns into a roll that's about 50/50 to KO you, and other stuff becomes minor 50/50s. Nothing major, but it's likely better spent than 88 points in Attack.