[Gen 8] Anything Goes
Expert Belt Draco Meteor lure
Eternatus @ Expert Belt
EVs: 16 HP / 152 SpA / 252 SpD / 88 Spe
IVs: 0 Atk
- Sludge Bomb
- Draco Meteor
This is really an underrated set, imo. If you had played AG before, then SpD Eternatus vs Eternatus war is very common, as each seeks to waste Dynamax Cannon's valuable PP while Recover stalling. But this set is a lure, with the more niche Draco Meteor over Dynamax Cannon being able to OHKO with Expert Belt.
Flamethrower has a nice roll to 2HKO physically defensive NDM which can be easily exploited. Sludge Bomb poisoning Ho-Oh and Yveltal so that they can't wall you forever, also prevents Xerneas from freely setting up on you.
The SpA EVs + nature hit 400 Base SpA, which is enough to OHKO other Eternatus. 88 Spe is for outspeeding base 95s, mainly Kyurem-W. The rest of HP EVs are just a dump, while 252 SpD preserve your bulk.
152+ SpA Expert Belt Eternatus Draco Meteor vs. 252 HP / 164 SpD Eternatus: 504-593 (104.1 - 122.5%) -- guaranteed OHKO
152+ SpA Expert Belt Eternatus Flamethrower vs. 252 HP / 4 SpD Prism Armor Necrozma-Dusk-Mane: 184-216 (46.2 - 54.2%) -- 96.1% chance to 2HKO after Stealth Rock
152+ SpA Expert Belt Eternatus Sludge Bomb vs. 0 HP / 0 SpD Xerneas: 403-475 (102.5 - 120.8%) -- guaranteed OHKO