Kommo-o @ Dragonium Z
Ability: Bulletproof
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Dragon Dance
- Outrage
- Close Combat
- Poison Jab
Wanted to throw something unorthodox out for this one. An aggresive double or a u-turn/Volt Switch gets it in. Tanks an ice beam, it d-dances once and the core is highly threatened. Z-Outrage deals with latias easily. Toxapex could potentially do something but only way i see is two minimum rolls, as ,even with a burn, after the first outrage it still has a decent chance for 2HKO. If you don't want to risk that you can arguably save the z for toxapex.
0 SpA Latias-Mega Ice Beam vs. 4 HP / 0 SpD Kommo-o: 168-198 (57.5 - 67.8%) -- guaranteed 2HKO
+1 252+ Atk Kommo-o Outrage vs. 252 HP / 4 Def Toxapex: 199-235 (65.4 - 77.3%) -- guaranteed 2HKO after Black Sludge recovery
+1 252+ Atk burned Kommo-o Outrage vs. 252 HP / 4 Def Toxapex: 99-117 (32.5 - 38.4%) -- 3.6% chance to 3HKO after Black Sludge recovery
As for other matchups, with the re-emergence of tyranitar, and kommo-o's natural ability to check it, ash-greninja, heatran, and other things I don't care to list, it can do work as long as the opposing team lacks some of the things that kommo-o just can't beat by itself, such as clefable, and tapu fini. And if you want to outspeed the standard choice scarf landorous after +1, just make it jolly, and Z guarantees the ko after rocks.