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
Diancie-Mega
RockFairy
OFFENSIVE CHECK
View matchup
49.008
79.9%
Standard error 8.07 points
▾
252+ Atk Pixie Plate Pixilate Diancie-Mega Extreme Speed vs. 252 HP / 0 Def Giratina: 450-530 (89.2 - 105.1%) -- 37.5% chance to OHKO
02
Gyarados-Mega
WaterDark
OFFENSIVE CHECK
View matchup
167.8
63.8%
Standard error 6.26 points
▾
0- Atk Huge Power Gyarados-Mega Knock Off (97.5 BP) vs. 252 HP / 0 Def Giratina: 470-554 (93.2 - 109.9%) -- 62.5% chance to OHKO
03
Mewtwo-Mega-X
PsychicFighting
OFFENSIVE CHECK
View matchup
237.076
58.8%
Standard error 5.38 points
▾
252+ Atk Huge Power Mewtwo-Mega-X Play Rough vs. 252 HP / 0 Def Giratina: 492-580 (97.6 - 115%) -- 87.5% chance to OHKO
04
Sableye-Mega
DarkGhost
DEFENSIVE CHECK
View matchup
80.234
65.2%
Standard error 7.22 points
▾
05
Gengar-Mega
GhostPoison
OFFENSIVE CHECK
View matchup
83.911
68.2%
Standard error 8.59 points
▾
252+ SpA Spooky Plate Gengar-Mega Judgment vs. 252 HP / 252+ SpD Giratina: 336-396 (66.6 - 78.5%) -- guaranteed 2HKO
06
Xerneas
Fairy
OFFENSIVE CHECK
View matchup
81.597
66.8%
Standard error 8.90 points
▾
252+ SpA Xerneas Moonblast vs. 252 HP / 252+ SpD Giratina: 218-260 (43.2 - 51.5%) -- 9.4% chance to 2HKO
07
Rayquaza-Mega
DragonFlying
OFFENSIVE CHECK
View matchup
164.31
56.6%
Standard error 6.63 points
▾
252+ SpA Rayquaza-Mega Oblivion Wing vs. 252 HP / 252+ SpD Giratina: 118-139 (23.4 - 27.5%) -- 73.2% chance to 4HKO
08
Deoxys-Speed
Psychic
OFFENSIVE CHECK
View matchup
116.99
56.5%
Standard error 7.39 points
▾
09
Lopunny-Mega
NormalFighting
OFFENSIVE CHECK
View matchup
47.643
65.0%
Standard error 9.76 points
▾
252+ Atk Lopunny-Mega Knock Off (97.5 BP) vs. 252 HP / 0 Def Giratina: 206-244 (40.8 - 48.4%) -- guaranteed 3HKO
10
Arceus
Normal
SOFT CHECK
View matchup
68.805
53.9%
Standard error 7.52 points
▾
11
Giratina
GhostDragon
SOFT CHECK
View matchup
283.627
42.1%
Standard error 4.89 points
▾
12
Kyogre-Primal
Water
SOFT CHECK
View matchup
136.576
45.1%
Standard error 7.10 points
▾
252+ SpA Kyogre-Primal Freeze-Dry vs. 252 HP / 252+ SpD Giratina: 136-162 (26.9 - 32.1%) -- guaranteed 4HKO
13
Groudon-Primal
GroundFire
SOFT CHECK
View matchup
170.318
42.5%
Standard error 6.46 points
▾
252+ Atk Groudon-Primal Precipice Blades vs. 252 HP / 0 Def Giratina: 237-279 (47 - 55.3%) -- 70.3% chance to 2HKO
14
Chansey
Normal
SOFT CHECK
View matchup
83.66
35.6%
Standard error 7.33 points
▾
252+ SpA Chansey Chatter vs. 252 HP / 252+ SpD Giratina: 24-29 (4.7 - 5.7%)
15
Regigigas
Normal
SOFT CHECK
View matchup
91.269
37.9%
Standard error 8.53 points
▾
252+ Atk Regigigas Pursuit (40 BP) vs. 252 HP / 0 Def Giratina: 98-116 (19.4 - 23%) -- possible 5HKO
16
Beedrill-Mega
BugPoison
SOFT CHECK
View matchup
22.512
44.4%
Standard error 10.47 points
▾
252+ Atk Beedrill-Mega Poison Jab vs. 252 HP / 0 Def Giratina: 68-81 (13.4 - 16%) -- possible 7HKO
17
Manectric-Mega
Electric
SOFT CHECK
View matchup
38.108
27.3%
Standard error 7.21 points
▾
252+ SpA Manectric-Mega Freeze-Dry vs. 252 HP / 252+ SpD Giratina: 112-132 (22.2 - 26.1%) -- 8.2% chance to 4HKO
18
Aegislash
SteelGhost
SOFT CHECK
View matchup
76.1
25.6%
Standard error 6.92 points
▾
19
Swampert-Mega
WaterGround
SOFT CHECK
View matchup
24.144
32.7%
Standard error 9.55 points
▾
252+ Atk Swampert-Mega Thousand Arrows vs. 252 HP / 0 Def Giratina: 153-181 (30.3 - 35.9%) -- 42.7% chance to 3HKO
20
Scizor-Mega
BugSteel
SOFT CHECK
View matchup
29.644
23.6%
Standard error 7.80 points
▾
252+ Atk Scizor-Mega Gear Grind (2 hits) vs. 252 HP / 0 Def Giratina: 170-204 (33.7 - 40.4%) -- guaranteed 3HKO
21
Slaking
Normal
SOFT CHECK
View matchup
26.893
20.1%
Standard error 7.73 points
▾
252+ Atk Slaking Pursuit (40 BP) vs. 252 HP / 0 Def Giratina: 98-116 (19.4 - 23%) -- possible 5HKO
Ranked #2 with 53.25% usage. Sorted by conservative score.