Zygarde @ Choice Band
Ability: Aura Break
EVs: 4 HP / 252 Atk / 252 Spe
Adamant Nature
- Thousand Arrows
- Extreme Speed
- Outrage
- Hidden Power [Fire]
While Zygarde is normally set up fodder, this can be used as a filler move to lure kart. It always gets the OHKO on kart and also has a decent chance of living 2 leaf blades unboosted.
252 Atk Kartana Leaf Blade vs. 4 HP / 0 Def Zygarde: 160-190 (44.6 - 53%) -- 30.5% chance to 2HKO
0- SpA Zygarde Hidden Power Fire vs. 4 HP / 0 SpD Kartana: 316-372 (121.5 - 143%) -- guaranteed OHKO
Sorry, but this is bad. Zygarde already wins without the garbage coverage move. And you've got to be pretty desperate to try to set up your Kart on a Zygarde. Most Zygarde sets carry DD, lots run extra bulk and/or Coil, and the ones that don't run CB. Ironically, CB is one of the better sets for Kart because of how little CB Espeed does comapared to Thousand Arrows:
252+ Atk Choice Band Zygarde Thousand Arrows vs. 4 HP / 0 Def Kartana: 160-189 (61.5 - 72.6%) -- guaranteed 2HKO
252+ Atk Choice Band Zygarde Extreme Speed vs. 4 HP / 0 Def Kartana: 47-56 (18 - 21.5%) -- possible 5HKO
252 Atk Kartana Leaf Blade vs. 4 HP / 0 Def Zygarde: 160-190 (44.6 - 53%) -- 30.5% chance to 2HKO
Sorry again, I don't want to be rude but I really couldn't resist calling this one out.
Anyway, as for mine - I have a strategy that hasn't been mentioned and two Pokemon who love using it:
Chansey @ Eviolite
Bold Nature
EVs: 252 Def / 12 SpD
- Seismic Toss
- Thunder Wave
- Stealth Rock
- Soft-Boiled
Ferrothorn @ Leftovers
Careful Nature
EVs: 48 Def / 208 SpD
- Spikes / Protect / Stealth Rock
- Leech Seed
- Power Whip / Gyro Ball
- Thunder Wave
As two of the maybe 3 things in OU that Kartana will freely swap into, Chansey and Ferro are the best lures for Kartana without any real recourse against it. Seismic Toss is dismal, HP Fire is hopelessly niche, but Thunder Wave hits the sweet spot of "This cripples SD Kartana and also works against a ton of other threats".
Chansey lures all sorts of walls and sweepers, and a lot of the things it checks hate Para. If an opposing Gren/Ash-Gren thinks they can get away with Spiking on you, para them and laugh. Predict the Medicham switch in, predict the Kart switch in (or just para it as it SD's and sack something else), predict Keldeo/Lele when they think you'll switch, laugh as Heatran fails to Magma trap you because it can't outspeed and Taunt you. Pretty much everything in the tier except for Zygarde, Koko, and Landorus-T is vulnerable in some sense to Paralysis, and the things that aren't vulnerable to the usual Toxic that goes in this moveset anyway (Ferrothorn, Pex, Gliscor). T-wave Chansey is one of the biggest (and worst) surprises that an opponent can throw at you.
Similar deal for Ferrothorn: it's got options and it can abuse opponents like Megazard X/Y, Tapu Bulu, Ash-Gren (trying to get lucky with a flinch), Volcarona, Kartana, Victini, M-Venusaur, and even opposing Ferrothorns. Knock Off and Protect are the usual 4th move on this set, but T-Wave can completely ruin a team that's built around Volcarona sweeping or Kartana breaking walls. Thunder Wave Ferrothorn is especially potent on offensive teams that need to nullify the tier's top threats immediately due to their lack of phasing or walls like Chansey to back them up.