Observed target KO or switch rate is upstream p: the fraction of relevant encounters where the target was knocked out or switched out. Standard error is upstream d. The conservative score is p − 4d. These ladder observations do not prove a set-specific counter.
How to read this table
Use encounter count and standard error to judge the sample. Damage estimates below use inferred sets and remain separate from the observed ladder metric.
#
Checker
Encounters
Conservative score
Target KO or switch rate
01
Dondozo
Water
DEFENSIVE CHECK
View matchup
567.02
76.1%
Standard error 2.98 points
▾
252+ Atk Zacian-Crowned Wild Charge vs. 252 HP / 252+ Def Unaware Dondozo: 158-186 (31.3 - 36.9%) -- guaranteed 4HKO after Leftovers recovery
02
Groudon-Primal
GroundFire
OFFENSIVE CHECK
View matchup
1,688.866
62.4%
Standard error 2.04 points
▾
252+ Atk Groudon-Primal Precipice Blades vs. 252 HP / 0 Def Zacian-Crowned: 488-576 (125.7 - 148.4%) -- guaranteed OHKO
03
Pheromosa
BugFighting
OFFENSIVE CHECK
View matchup
96.238
76.8%
Standard error 5.96 points
▾
252+ Atk Choice Band Pheromosa High Jump Kick vs. 252 HP / 0 Def Zacian-Crowned: 322-381 (82.9 - 98.1%) -- guaranteed 2HKO
04
Ditto
Normal
DEFENSIVE CHECK
View matchup
184.937
73.1%
Standard error 5.63 points
▾
+1 252+ Atk Zacian-Crowned Close Combat vs. 252 HP / 252+ Def Ditto: 528-622 (176 - 207.3%) -- guaranteed OHKO
05
Melmetal
Steel
DEFENSIVE CHECK
View matchup
118.723
74.1%
Standard error 6.91 points
▾
+1 252+ Atk Zacian-Crowned Close Combat vs. 252 HP / 252+ Def Melmetal: 268-316 (56.5 - 66.6%) -- guaranteed 2HKO
06
Zygarde
DragonGround
DEFENSIVE CHECK
View matchup
675.983
57.4%
Standard error 3.28 points
▾
+1 252+ Atk Zacian-Crowned Play Rough vs. 252 HP / 252+ Def Zygarde: 338-402 (80.4 - 95.7%) -- guaranteed 2HKO after Leftovers recovery
07
Marshadow
FightingGhost
SOFT CHECK
View matchup
733.424
54.1%
Standard error 3.15 points
▾
+1 252+ Atk Marshadow Spectral Thief vs. 252 HP / 0 Def Zacian-Crowned: 210-247 (54.1 - 63.6%) -- guaranteed 2HKO
08
Necrozma-Dusk-Mane
PsychicSteel
SOFT CHECK
View matchup
611.132
54.1%
Standard error 3.46 points
▾
0- Atk Necrozma-Dusk-Mane Earthquake vs. 252 HP / 0 Def Zacian-Crowned: 170-202 (43.8 - 52%) -- 11.7% chance to 2HKO
09
Zacian-Crowned
FairySteel
SOFT CHECK
View matchup
681.028
49.9%
Standard error 3.31 points
▾
+1 252+ Atk Zacian-Crowned Iron Head vs. 252 HP / 0 Def Zacian-Crowned: 211-250 (54.3 - 64.4%) -- guaranteed 2HKO
10
Calyrex-Ice
PsychicIce
DEFENSIVE CHECK
View matchup
114.329
66.0%
Standard error 7.46 points
▾
+1 252+ Atk Zacian-Crowned Iron Head vs. 252 HP / 252+ Def Calyrex-Ice: 258-306 (63.8 - 75.7%) -- guaranteed 2HKO
11
Ho-Oh
FireFlying
SOFT CHECK
View matchup
769.224
42.8%
Standard error 3.05 points
▾
252+ Atk Ho-Oh Sacred Fire vs. 252 HP / 0 Def Zacian-Crowned: 320-378 (82.4 - 97.4%) -- guaranteed 2HKO
12
Deoxys-Attack
Psychic
OFFENSIVE CHECK
View matchup
141.134
56.4%
Standard error 7.07 points
▾
0- Atk Life Orb Deoxys-Attack Low Kick (120 BP) vs. 252 HP / 0 Def Zacian-Crowned: 149-177 (38.4 - 45.6%) -- guaranteed 3HKO
13
Yveltal
DarkFlying
SOFT CHECK
View matchup
1,361.95
32.1%
Standard error 2.19 points
▾
+1 0- Atk Life Orb Dark Aura Yveltal Foul Play vs. 252 HP / 0 Def Zacian-Crowned: 149-177 (38.4 - 45.6%) -- guaranteed 3HKO
14
Arceus
Normal
SOFT CHECK
View matchup
309.093
41.9%
Standard error 4.83 points
▾
252+ Atk Life Orb Arceus Earthquake vs. 252 HP / 0 Def Zacian-Crowned: 263-309 (67.7 - 79.6%) -- guaranteed 2HKO
15
Arceus-Ground
Ground
SOFT CHECK
View matchup
267.281
41.7%
Standard error 5.21 points
▾
252+ SpA Earth Plate Arceus-Ground Judgment vs. 252 HP / 252+ SpD Zacian-Crowned: 266-314 (68.5 - 80.9%) -- guaranteed 2HKO
16
Chi-Yu
DarkFire
SOFT CHECK
View matchup
52.806
51.9%
Standard error 9.44 points
▾
252+ SpA Beads of Ruin Chi-Yu Overheat vs. 252 HP / 252+ SpD Zacian-Crowned: 420-494 (108.2 - 127.3%) -- guaranteed OHKO
17
Kyogre-Primal
Water
SOFT CHECK
View matchup
328.341
29.9%
Standard error 4.35 points
▾
252+ SpA Kyogre-Primal Water Spout (150 BP) vs. 252 HP / 252+ SpD Zacian-Crowned in Heavy Rain: 337-397 (86.8 - 102.3%) -- 18.8% chance to OHKO
18
Eternatus
PoisonDragon
SOFT CHECK
View matchup
571.943
23.6%
Standard error 3.03 points
▾
252+ SpA Eternatus Fire Blast vs. 252 HP / 252+ SpD Zacian-Crowned: 188-222 (48.4 - 57.2%) -- 91.8% chance to 2HKO
19
Kyogre
Water
SOFT CHECK
View matchup
54.955
47.5%
Standard error 9.42 points
▾
252+ SpA Kyogre Water Spout (150 BP) vs. 252 HP / 252+ SpD Zacian-Crowned in Rain: 294-346 (75.7 - 89.1%) -- guaranteed 2HKO
20
Chien-Pao
DarkIce
SOFT CHECK
View matchup
270.473
26.4%
Standard error 4.59 points
▾
252+ Atk Sword of Ruin Chien-Pao Sacred Sword vs. 252 HP / 0 Def Zacian-Crowned: 121-143 (31.1 - 36.8%) -- 73.6% chance to 3HKO
21
Salamence-Mega
DragonFlying
SOFT CHECK
View matchup
83.574
44.9%
Standard error 9.25 points
▾
252+ Atk Salamence-Mega Earthquake vs. 252 HP / 0 Def Zacian-Crowned: 230-272 (59.2 - 70.1%) -- guaranteed 2HKO
22
Lunala
PsychicGhost
SOFT CHECK
View matchup
134.705
35.8%
Standard error 7.09 points
▾
252+ SpA Lunala Moongeist Beam vs. 252 HP / 252+ SpD Zacian-Crowned: 123-145 (31.7 - 37.3%) -- 88.4% chance to 3HKO
23
Giratina-Origin
GhostDragon
SOFT CHECK
View matchup
368.146
19.8%
Standard error 3.54 points
▾
0- Atk Griseous Core Giratina-Origin Poltergeist vs. 252 HP / 0 Def Zacian-Crowned: 133-157 (34.2 - 40.4%) -- guaranteed 3HKO
24
Alomomola
Water
SOFT CHECK
View matchup
314.495
20.4%
Standard error 3.87 points
▾
252+ Atk Alomomola Flip Turn vs. 252 HP / 0 Def Zacian-Crowned: 67-79 (17.2 - 20.3%) -- possible 5HKO
25
Landorus-Therian
GroundFlying
SOFT CHECK
View matchup
21.174
46.5%
Standard error 10.84 points
▾
252+ Atk Landorus-Therian Earthquake vs. 252 HP / 0 Def Zacian-Crowned: 344-408 (88.6 - 105.1%) -- 31.3% chance to OHKO
26
Rayquaza
DragonFlying
SOFT CHECK
View matchup
92.984
34.7%
Standard error 8.32 points
▾
252+ Atk Choice Band Rayquaza V-create vs. 252 HP / 0 Def Zacian-Crowned: 636-750 (163.9 - 193.2%) -- guaranteed OHKO
27
Arceus-Dark
Dark
SOFT CHECK
View matchup
467.74
11.5%
Standard error 2.54 points
▾
+1 0- Atk Dread Plate Arceus-Dark Foul Play vs. 252 HP / 0 Def Zacian-Crowned: 105-123 (27 - 31.7%) -- guaranteed 4HKO
28
Arceus-Fairy
Fairy
SOFT CHECK
View matchup
390.579
9.0%
Standard error 2.44 points
▾
252+ SpA Arceus-Fairy Earth Power vs. 252 HP / 252+ SpD Zacian-Crowned: 134-158 (34.5 - 40.7%) -- guaranteed 3HKO
29
Mewtwo-Mega-X
PsychicFighting
SOFT CHECK
View matchup
120.474
19.5%
Standard error 5.09 points
▾
252+ Atk Mewtwo-Mega-X Low Kick (120 BP) vs. 252 HP / 0 Def Zacian-Crowned: 255-301 (65.7 - 77.5%) -- guaranteed 2HKO
30
Mewtwo
Psychic
SOFT CHECK
View matchup
93.837
31.1%
Standard error 8.13 points
▾
252+ SpA Mewtwo Earth Power vs. 252 HP / 252+ SpD Zacian-Crowned: 160-190 (41.2 - 48.9%) -- guaranteed 3HKO
Ranked #2 with 45.44% usage. Sorted by conservative score.