What are Pokémon counters?

Pokémon counters are specific Pokémon that can reliably switch into a target and force it out or knock it out. We calculate KO rates from real Smogon ranked ladder data by recording every time two Pokémon face off. This shows which checks actually work in practice, not just on paper.

How are the counter check percentages calculated?

Each percentage shown is the KO rate: the fraction of real ladder encounters between two Pokémon where the counter either forced a switch (KOed) or was knocked out itself. For example, a +75% KO rate means the counter won the matchup three out of four times. Only matchups with enough encounters to be statistically meaningful are shown. These stats are sourced from Smogon Porygon's match-up data and recalculated every month.

How often are the counter lists updated?

Counter data is regenerated monthly, shortly after Smogon publishes new usage statistics. Each update reflects the current metagame and the latest tier shifts.

How do I use the Pokémon counter search?

Use the search bar to find any Pokémon and see its best checks across all available Smogon tiers. Click a format card to browse the full threat list for a specific tier. Click any Pokémon to see its top counters ranked by KO rate, with damage calculations and teammate data. You can also browse by generation: all the way back to Gen 5.

"cloyster" – Pokémon Counter Search

17 results for “cloyster” across 17 formats · 2 counter guides · 15 usage-only · Clear

Search: "cloyster"

Gen 2 OU #2 · 62.12%

Gen 1 OU #11 · 19.62%

Gen 3 OU #30 · 3.25%

Gen 6 OU #42 · 4.16%

Gen 8 OU #57 · 1.72%

Gen 5 Ubers #27 · 6.68%

Gen 6 Ubers #28 · 4.49%

Gen 8 National Dex #64 · 2.54%

Gen 9 National Dex UU #49 · 2.82%

Gen 9 Monotype #97 · 1.13%

Gen 9 BSS Reg I #30 · 7.16%

Gen 9 Mix and Mega #61 · 2.25%

Gen 3 FRLG OU #21 · 5.09%

Gen 9 Monocolor #33 · 5.87%

Gen 9 Staaabmons #67 · 1.50%

Gen 9 Sketchmons #69 · 1.98%

Gen 9 Shared Power #79 · 1.88%