Nominating
to C+/C/C-.
Whenever you see this guy, the first thing people think is either "why are people even bothering with this overhyped pseudo" or "oh boy I gotta stop the Z-move with my tapu/fairy". What people do not know, however, is that with the right support, this thing becomes
a bona fide win condition.
Kommo-o @ Salac Berry
Ability: Bulletproof
EVs: 4 HP / 252 Atk / 4 Def / 12 SpD / 236 Spe
Adamant Nature
- Drain Punch
- Earthquake/Thunder Punch/Iron Head
- Substitute
- Belly Drum
Feel free to laugh at this seemingly unviable set, because in practice Kommo-o has far more setup opportunities that all you guys give it credit for (seriously, this thing resist Fire, Water, Grass, Electric, Bug, Rock & Dark). The gist is pretty simple: set a sub into something passive like Ferrothorn (fun fact: Bulletproof blocks Gyro Ball for some reason), Mantine, M-Venu & Rotom-W, or something weak to you like SpDef Heatran, Tyranitar & Stakataka. Click Belly Drum, then Drain Punch and then whatever other move you have for coverage. If you've done everything right, you should have +6 atk, +1spd (enough to outspeed Koko with the provided EV spread),
all your HP back and at least have nabbed a kill or 2.
If you're using it with Sticky Webs + SR, the only thing that stops you 100% of the time is a crit from a Scarfed Landorus-T, Scarf Lati@s, Mega Pinsir's +2 Quick Attack, Unburden Boosted Hawlucha and Mimikyu. Defensive answers are every Unaware mon, a full HP Skarmory with Roar/Windywinds and Toxapex (and even then, you can always run EQ for it)
Here's some replays proving you don't even need to know what you're doing to win
but not really:
https://replay.pokemonshowdown.com/gen7ou-662841432
https://replay.pokemonshowdown.com/gen7ou-662693540
http://replay.pokemonshowdown.com/gen7ou-666194940 (why yes, I did just sack M-Gyarados just to show off I could win with Kommo-o)
http://replay.pokemonshowdown.com/gen7ou-669375974
http://replay.pokemonshowdown.com/gen7ou-667115150
http://replay.pokemonshowdown.com/gen7ou-667118682
http://replay.pokemonshowdown.com/gen7ou-668919567
I'm not nominating it higher because I've been testing this specific set mostly in a HO team, so I've no idea if this set could work in other archetypes or if the highly overrated Z-Kommo-o set actually helps making it more unpredictable or something (even though I've seen people having legitimate success with it on the high ladder). Also:
Alternative: don't use Kommo-O in OU because it will never be close to as good as it is in lower tiers (specifically RU, where the Z crystal for it just got banned). Kommo-O has a few glaring, fundamental flaws that will prevent it from ever being good in OU this generation -- it is 4x weak to Fairy, it lacks any standout stats (110/100/85 offensive stats are blatantly underwhelming for OU and 125 defense is not as great as you would think when it only has 75 base HP and generally runs offensive sets), and it does not have anything else going for it that lets it take advantage of this Z crystal enough to make it a consistent win condition. Overall, Kommo-O probably is not even viable in the tier, let alone worth using on serious teams. I strongly urge posters to stop discussing it here and in other threads (yes, I know this is SQSA, but here's my answer to any Kommo-O related question from here on out).
Edit: added more replays, now around the 1700s.