Is Arceus-Water viable in Gen 9 Pure Hackmons?

Arceus-Water is ranked #4 in Gen 9 Pure Hackmons with 38.29% usage according to Smogon Aug 2026 - Sep 2026 data.

What beats Arceus-Water in Gen 9 Pure Hackmons?

Zamazenta has the strongest conservative score in this observed Aug 2026 - Sep 2026 sample. The target was knocked out or switched out in 80.4% of 24.066844038325915 relevant encounters. Standard error is 8.1 points. Sets and switch conditions can change the result.

How are Arceus-Water matchup checks ranked in Gen 9 Pure Hackmons?

They are ranked by p minus four standard errors. Here, p is the observed fraction of relevant encounters where Arceus-Water was knocked out or switched out. This is not a set-specific battle guarantee.

Arceus-Water counters

Gen 9 Pure Hackmons · Smogon source period Aug 2026 - Sep 2026

#0493 Arceus-Water

Water

USAGE 38.3% #4

ABILITYWonder Guard

BASE STATS

HP 120

ATK 120

DEF 120

SPA 120

SPD 120

SPE 120

BST720

TYPE MATCHUPS

2×

ElectricGrass

½×

FireWaterIceSteel

Moves

Revival Blessing 68.2% Lunar Dance 56.4% Tidy Up 45.7% Perish Song 41.5% Surging Strikes 39.6% Sticky Web 19.4% Scald 18.1% Taunt 17.9%

Items

Ability Shield 95.4% Leppa Berry 2.2% Leftovers 1.8% Covert Cloak 0.3% Choice Scarf 0.1% Heavy-Duty Boots 0.1% Sitrus Berry 0.0% Life Orb 0.0%

Abilities

Wonder Guard95.6%Neutralizing Gas1.7%Shadow Tag1.1%Magic Bounce0.9%Good as Gold0.5%Multitype0.1%Fur Coat0.0%Skill Link0.0%

Tera Types

Grass 37.2% Fairy 15.6% Dragon 10.9% Steel 7.8% Fire 7.6% Water 6.4% Electric 6.1% Ghost 4.1%

Common Teammates

Leading observed checks

Open a matchup for a separate set-based damage estimate, or browse uploaded teams with both Pokémon.

Checks & Counters

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

Zamazenta

Fighting OFFENSIVE CHECK View matchup

24.067

48.0

80.4% Standard error 8.09 points

Mewtwo-Mega-X

PsychicFighting OFFENSIVE CHECK View matchup

78.453

47.6

68.6% Standard error 5.24 points

DAMAGE CALC

0- Atk Huge Power Mewtwo-Mega-X Flower Trick vs. 252 HP / 0 Def Arceus-Water on a critical hit: 408-482 (91.8 - 108.5%) -- 50% chance to OHKO

View Mewtwo-Mega-X counters →

Regieleki

Electric OFFENSIVE CHECK View matchup

87.179

37.3

58.4% Standard error 5.28 points

Calyrex-Shadow

PsychicGhost OFFENSIVE CHECK View matchup

52.595

30.7

58.0% Standard error 6.81 points

Groudon-Primal

GroundFire SOFT CHECK View matchup

73.946

20.9

44.0% Standard error 5.77 points

DAMAGE CALC

252+ Atk Neutralizing Gas Groudon-Primal Bolt Strike vs. 252 HP / 0 Def Ability Shield Arceus-Water: 340-402 (76.5 - 90.5%) -- guaranteed 2HKO

View Groudon-Primal counters →

Kartana

GrassSteel SOFT CHECK View matchup

48.138

20.8

49.6% Standard error 7.21 points

Arceus-Dark

Dark DEFENSIVE CHECK View matchup

23.062

17.6

58.6% Standard error 10.26 points

DAMAGE CALC

252+ Atk Ability Shield Arceus-Water Surging Strikes (3 hits) vs. 252 HP / 252+ Def Neutralizing Gas Arceus-Dark on a critical hit: 126-153 (28.3 - 34.4%) -- 0.1% chance to 3HKO

View Arceus-Dark counters →

Arceus

Normal SOFT CHECK View matchup

36.152

13.2

46.4% Standard error 8.29 points

Blissey

Normal SOFT CHECK View matchup

28.752

-0.2

35.4% Standard error 8.92 points

Arceus-Water

Water SOFT CHECK View matchup

28.375

-1.5

34.1% Standard error 8.90 points

Eternatus

PoisonDragon SOFT CHECK View matchup

22.259

-9.1

29.7% Standard error 9.68 points

Ranked #4 with 38.29% usage. Sorted by conservative score.