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
Arceus-Fairy
Fairy
DEFENSIVE CHECK
View matchup
478.726
79.3%
Standard error 1.85 points
▾
252+ SpA Life Orb Yveltal Oblivion Wing vs. 252 HP / 252+ SpD Arceus-Fairy: 121-142 (27.2 - 31.9%) -- guaranteed 4HKO
02
Arceus-Dark
Dark
DEFENSIVE CHECK
View matchup
496.023
72.3%
Standard error 2.01 points
▾
0- Atk Life Orb Yveltal U-turn vs. 252 HP / 0 Def Arceus-Dark: 130-153 (29.2 - 34.4%) -- 4.8% chance to 3HKO
03
Diancie-Mega
RockFairy
OFFENSIVE CHECK
View matchup
89.299
77.6%
Standard error 4.42 points
▾
0- Atk Diancie-Mega Diamond Storm vs. 252 HP / 0 Def Yveltal: 306-360 (67.1 - 78.9%) -- guaranteed 2HKO
04
Eternatus
PoisonDragon
OFFENSIVE CHECK
View matchup
501.852
66.2%
Standard error 2.11 points
▾
+1 252+ SpA Eternatus Meteor Beam vs. 252 HP / 252+ SpD Yveltal: 340-402 (74.5 - 88.1%) -- guaranteed 2HKO
05
Zacian-Crowned
FairySteel
OFFENSIVE CHECK
View matchup
1,174.043
62.2%
Standard error 1.42 points
▾
+1 252+ Atk Zacian-Crowned Play Rough vs. 252 HP / 0 Def Yveltal: 560-662 (122.8 - 145.1%) -- guaranteed OHKO
06
Arceus
Normal
DEFENSIVE CHECK
View matchup
320.622
63.3%
Standard error 2.69 points
▾
0- Atk Life Orb Dark Aura Yveltal Knock Off (97.5 BP) vs. 252 HP / 0 Def Arceus: 177-211 (39.8 - 47.5%) -- guaranteed 3HKO
07
Tyranitar
RockDark
OFFENSIVE CHECK
23.448
81.2%
Standard error 8.07 points
08
Kingambit
DarkSteel
DEFENSIVE CHECK
View matchup
153.587
64.0%
Standard error 3.87 points
▾
252+ SpA Life Orb Dark Aura Yveltal Dark Pulse vs. 252 HP / 252+ SpD Kingambit: 99-117 (24.5 - 28.9%) -- 99.8% chance to 4HKO
09
Chien-Pao
DarkIce
OFFENSIVE CHECK
View matchup
177.103
62.0%
Standard error 3.65 points
▾
252+ Atk Sword of Ruin Chien-Pao Icicle Crash vs. 252 HP / 0 Def Yveltal: 404-476 (88.5 - 104.3%) -- 31.3% chance to OHKO
10
Kyogre-Primal
Water
SOFT CHECK
View matchup
385.36
54.3%
Standard error 2.54 points
▾
252+ SpA Kyogre-Primal Water Spout (150 BP) vs. 252 HP / 252+ SpD Yveltal in Heavy Rain: 378-445 (82.8 - 97.5%) -- guaranteed 2HKO
11
Arceus-Ground
Ground
SOFT CHECK
View matchup
425.324
51.6%
Standard error 2.42 points
▾
0- Atk Arceus-Ground Stone Edge vs. 252 HP / 0 Def Yveltal: 158-188 (34.6 - 41.2%) -- guaranteed 3HKO
12
Melmetal
Steel
DEFENSIVE CHECK
View matchup
102.487
60.5%
Standard error 4.83 points
▾
252+ SpA Life Orb Dark Aura Yveltal Dark Pulse vs. 252 HP / 252+ SpD Melmetal: 234-277 (49.3 - 58.4%) -- 98% chance to 2HKO
13
Garganacl
Rock
DEFENSIVE CHECK
View matchup
151.646
56.1%
Standard error 4.03 points
▾
252+ SpA Life Orb Dark Aura Yveltal Dark Pulse vs. 252 HP / 252+ SpD Garganacl: 192-227 (47.5 - 56.1%) -- 28.1% chance to 2HKO after Leftovers recovery
14
Yveltal
DarkFlying
SOFT CHECK
View matchup
947.86
45.8%
Standard error 1.62 points
▾
252+ SpA Life Orb Yveltal Oblivion Wing vs. 252 HP / 252+ SpD Yveltal: 138-164 (30.2 - 35.9%) -- 36.2% chance to 3HKO
15
Zygarde
DragonGround
SOFT CHECK
View matchup
802.911
44.2%
Standard error 1.75 points
▾
252+ Atk Zygarde Thousand Arrows vs. 252 HP / 0 Def Yveltal: 141-166 (30.9 - 36.4%) -- 59.5% chance to 3HKO
16
Lunala
PsychicGhost
SOFT CHECK
View matchup
267.153
47.7%
Standard error 3.06 points
▾
+1 252+ SpA Lunala Meteor Beam vs. 252 HP / 252+ SpD Yveltal: 328-386 (71.9 - 84.6%) -- guaranteed 2HKO
17
Mewtwo
Psychic
SOFT CHECK
View matchup
106.52
53.5%
Standard error 4.83 points
▾
252+ SpA Life Orb Mewtwo Ice Beam vs. 252 HP / 252+ SpD Yveltal: 234-276 (51.3 - 60.5%) -- guaranteed 2HKO
18
Chi-Yu
DarkFire
OFFENSIVE CHECK
View matchup
21.191
71.7%
Standard error 9.78 points
▾
252+ SpA Beads of Ruin Chi-Yu Overheat vs. 252 HP / 252+ SpD Yveltal: 234-276 (51.3 - 60.5%) -- guaranteed 2HKO
19
Groudon-Primal
GroundFire
SOFT CHECK
View matchup
1,098.771
37.7%
Standard error 1.46 points
▾
252+ Atk Groudon-Primal Heat Crash (100 BP) vs. 252 HP / 0 Def Yveltal in Harsh Sunshine: 360-424 (78.9 - 92.9%) -- guaranteed 2HKO
20
Ferrothorn
GrassSteel
SOFT CHECK
View matchup
148.356
46.6%
Standard error 4.10 points
▾
252+ Atk Ferrothorn Power Whip vs. 252 HP / 0 Def Yveltal: 90-106 (19.7 - 23.2%) -- possible 5HKO
21
Ho-Oh
FireFlying
SOFT CHECK
View matchup
1,147.871
34.8%
Standard error 1.41 points
▾
252+ Atk Ho-Oh Brave Bird vs. 252 HP / 0 Def Yveltal: 225-265 (49.3 - 58.1%) -- 98% chance to 2HKO
22
Chansey
Normal
SOFT CHECK
View matchup
116.453
46.6%
Standard error 4.62 points
▾
Chansey Seismic Toss vs. 252 HP Yveltal: 100-100 (21.9 - 21.9%) -- guaranteed 5HKO
23
Calyrex-Ice
PsychicIce
SOFT CHECK
View matchup
101.908
47.5%
Standard error 4.95 points
▾
252+ Atk Calyrex-Ice Glacial Lance vs. 252 HP / 0 Def Yveltal: 540-636 (118.4 - 139.4%) -- guaranteed OHKO
24
Salamence-Mega
DragonFlying
SOFT CHECK
View matchup
107.273
46.2%
Standard error 4.81 points
▾
252+ Atk Aerilate Salamence-Mega Double-Edge vs. 252 HP / 0 Def Yveltal: 292-345 (64 - 75.6%) -- guaranteed 2HKO
25
Kyurem-Black
DragonIce
SOFT CHECK
View matchup
79.708
48.6%
Standard error 5.60 points
▾
252+ Atk Kyurem-Black Icicle Spear (3 hits) vs. 252 HP / 0 Def Yveltal: 348-414 (76.3 - 90.7%) -- guaranteed 2HKO
26
Terapagos
Normal
DEFENSIVE CHECK
View matchup
25.499
63.9%
Standard error 9.51 points
▾
0- Atk Life Orb Dark Aura Yveltal Knock Off (97.5 BP) vs. 252 HP / 0 Def Terapagos: 238-281 (61.9 - 73.1%) -- guaranteed 2HKO
27
Marshadow
FightingGhost
SOFT CHECK
View matchup
560.209
32.6%
Standard error 1.98 points
▾
252+ Atk Technician Marshadow Rock Tomb vs. 252 HP / 0 Def Yveltal: 220-260 (48.2 - 57%) -- 91.8% chance to 2HKO
28
Mewtwo-Mega-X
PsychicFighting
SOFT CHECK
View matchup
84.824
45.6%
Standard error 5.41 points
▾
252+ Atk Mewtwo-Mega-X Stone Edge vs. 252 HP / 0 Def Yveltal: 334-394 (73.2 - 86.4%) -- guaranteed 2HKO
29
Ditto
Normal
SOFT CHECK
View matchup
153.219
38.1%
Standard error 3.92 points
▾
Ditto vs. Yveltal: 0-0 (0 - 0%)
30
Gholdengo
SteelGhost
SOFT CHECK
View matchup
58.553
46.7%
Standard error 6.52 points
▾
252+ SpA Gholdengo Make It Rain vs. 252 HP / 252+ SpD Yveltal: 160-189 (35 - 41.4%) -- guaranteed 3HKO
Ranked #3 with 40.66% usage. Sorted by conservative score.