Is Forretress viable in Gen 3 OU?

Forretress is ranked #12 in Gen 3 OU with 19.69% usage according to Smogon May 2026 - Jul 2026 data.

What beats Forretress in Gen 3 OU?

Tyranitar has the strongest conservative score in this observed May 2026 - Jul 2026 sample. The target was knocked out or switched out in 82.5% of 23.64364460913711 relevant encounters. Standard error is 7.8 points. Sets and switch conditions can change the result.

How are Forretress matchup checks ranked in Gen 3 OU?

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

Forretress counters

Gen 3 OU · Sorted by p − 4 standard errors · Smogon source period May 2026 - Jul 2026 · Generated 2026-08-05

#0205 Forretress

BugSteel

USAGE 19.7% #12

BASE STATS

HP 75

ATK 90

DEF 140

SPA 60

SPD 60

SPE 40

BST465

TYPE MATCHUPS

4×

Fire

½×

NormalIcePsychicBugDragonSteelFairy

¼×

Grass

0×

Poison

Moves

Spikes 99.9% Rapid Spin 95.6% Explosion 82.7% Hidden Power Ghost 47.4% Hidden Power Bug 43.7% Earthquake 8.9% Rest 6.3% Counter 5.6%

Items

Leftovers 100.0% Lum Berry 0.0% Choice Band 0.0% nothing 0.0% Silk Scarf 0.0% Quick Claw 0.0% Salac Berry 0.0% Focus Band 0.0%

Common Teammates

Browse Gen 3 OU teams using Forretress →

Explore Forretress + Tyranitar teams 51 score Explore Forretress + Swampert teams 12 score Explore Forretress + Skarmory teams 4 score Explore Forretress + Blissey teams -10 score

Leading observed checks

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

Team core to explore

Forretress + Tyranitar 80.8% teammate usage Explore teams →

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

Tyranitar

RockDark OFFENSIVE CHECK View matchup

23.644

51.3

82.5% Standard error 7.81 points

DAMAGE CALCSand

252+ Atk Tyranitar Focus Punch vs. 252 HP / 0 Def Forretress: 137-162 (38.7 - 45.7%) -- guaranteed 3HKO after Leftovers recovery

View Tyranitar counters → Teams with Tyranitar →

Swampert

WaterGround OFFENSIVE CHECK View matchup

20.636

11.7

55.5% Standard error 10.94 points

DAMAGE CALC

252+ SpA Swampert Hydro Pump vs. 252 HP / 252+ SpD Forretress: 158-187 (44.6 - 52.8%) -- guaranteed 3HKO after Leftovers recovery

View Swampert counters → Teams with Swampert →

Skarmory

SteelFlying SOFT CHECK View matchup

34.837

4.0

36.7% Standard error 8.17 points

DAMAGE CALC

252+ Atk Skarmory Drill Peck vs. 252 HP / 0 Def Forretress: 79-93 (22.3 - 26.2%) -- possible 5HKO

View Skarmory counters → Teams with Skarmory →

Blissey

Normal SOFT CHECK View matchup

23.671

-10.5

25.2% Standard error 8.92 points

DAMAGE CALC

Blissey Seismic Toss vs. 252 HP Forretress: 100-100 (28.2 - 28.2%) -- guaranteed 5HKO after Leftovers recovery

View Blissey counters → Teams with Blissey →

Ranked #12 with 19.69% usage. Sorted by conservative score.