>>37362535>>37362571>max HP on GuzzlordBad spread. You only get a 10% increase in HP by giving it 252 HP EVs, while you get a ~22% increase by putting half of that in a defense stat.
252 SpA Mew Moonblast vs. 252 HP / 0 SpD Guzzlord: 576-680 (88.6 - 104.6%) -- 31.3% chance to OHKO
252 Atk Mew Play Rough vs. 252 HP / 0 Def Guzzlord: 544-644 (83.6 - 99%) -- guaranteed 2HKO
>252 SpA Mew Moonblast vs. 0 HP / 128 SpD Guzzlord: 472-556 (80.4 - 94.7%) -- guaranteed 2HKO
252 Atk Mew Play Rough vs. 0 HP / 128 Def Guzzlord: 444-524 (75.6 - 89.2%) -- guaranteed 2HKO