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To find a Pokémon’s weakness, identify the attacking move’s type and compare it with the defending Pokémon’s type or types. In the modern chart, a super-effective hit deals 2× damage, a resistance deals ½×, an immunity deals 0×, and an unmarked matchup is neutral. Dual types multiply those results, while abilities and game-specific mechanics can change the outcome.
How Pokémon type matchups work
A type chart is read from the move’s attacking type to the target’s defending type. It describes type effectiveness, not the entire damage formula. The official Pokémon chart is based on the latest game in the series and warns that type affinity can differ by game, so use the chart for the specific title or generation you are playing when accuracy matters.
- Super effective: 2× type-effectiveness multiplier.
- Not very effective: ½× multiplier.
- Immune: 0×; the move has no effect through ordinary type interaction.
- Neutral: 1×; the matchup is neither boosted nor reduced.
Modern defensive type chart
“Weak to” lists attacking types that are super effective against the defending type. “Resists” lists attacking types that deal reduced damage, and “immune to” lists attacking types that normally deal no damage. This is a single-type reference; dual typing requires multiplication.
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| Defending type | Weak to | Resists | Immune to |
|---|---|---|---|
| Normal | Fighting | — | Ghost |
| Fire | Water, Ground, Rock | Fire, Grass, Ice, Bug, Steel, Fairy | — |
| Water | Electric, Grass | Fire, Water, Ice, Steel | — |
| Electric | Ground | Electric, Flying, Steel | — |
| Grass | Fire, Ice, Poison, Flying, Bug | Water, Electric, Grass, Ground | — |
| Ice | Fire, Fighting, Rock, Steel | Ice | — |
| Fighting | Flying, Psychic, Fairy | Bug, Rock, Dark | — |
| Poison | Ground, Psychic | Grass, Fighting, Poison, Bug, Fairy | — |
| Ground | Water, Grass, Ice | Poison, Rock | Electric |
| Flying | Electric, Ice, Rock | Grass, Fighting, Bug | Ground |
| Psychic | Bug, Ghost, Dark | Fighting, Psychic | — |
| Bug | Fire, Flying, Rock | Grass, Fighting, Ground | — |
| Rock | Water, Grass, Fighting, Ground, Steel | Normal, Fire, Poison, Flying | — |
| Ghost | Ghost, Dark | Poison, Bug | Normal, Fighting |
| Dragon | Ice, Dragon, Fairy | Fire, Water, Electric, Grass | — |
| Dark | Fighting, Bug, Fairy | Ghost, Dark | Psychic |
| Steel | Fire, Fighting, Ground | Normal, Grass, Ice, Flying, Psychic, Bug, Rock, Dragon, Steel, Fairy | Poison |
| Fairy | Poison, Steel | Fighting, Bug, Dark | Dragon |
Calculating weaknesses for dual-type Pokémon
Apply the move’s type to each of the defender’s types, then multiply the two results.
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- Find the attacking type of the move.
- Check its multiplier against the first defending type.
- Check the same move against the second defending type.
- Multiply the factors to get the type-effectiveness result.
Two weaknesses
A Water move against a Ground/Rock Pokémon is super effective against both types: 2 × 2 = 4×.
Weakness plus resistance
If a move is super effective against one defensive type but resisted by the other, the effects cancel: 2 × ½ = 1× neutral damage.
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Two resistances
When both defensive types resist the move, the result is ½ × ½ = ¼×.
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Any immunity
A 0× interaction multiplied by any other factor remains 0× under ordinary type rules. For example, Ground is immune to Electric, and Flying is immune to Ground.
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STAB is separate from type effectiveness
Same-Type Attack Bonus, usually called STAB, applies when a Pokémon uses a move that shares one of its own types. The modern mechanics description used by Pokémon Database gives STAB as a 1.5× bonus. It is multiplied with the type result rather than replacing it.
For example, a Pokémon using a same-type move against a target with a 4× weakness has a combined type-and-STAB multiplier of 4 × 1.5 = 6× before other mechanics are applied.
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Why a move may do less damage—or none
The chart explains type affinity, but it does not account for every battle result. Check these possibilities when the displayed damage does not match your expectation:
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- The target may have two types whose multipliers cancel or compound.
- An ability may modify, block, or redirect a type interaction. Pokémon’s official battle guidance notes that abilities can help in battle.
- The title or generation may use a different chart or game-specific rule.
- STAB, stats, held items, weather, critical hits, status effects, and other mechanics can alter final damage without changing the type matchup.
Modern chart versus older Pokémon games
Do not silently apply the modern chart to every release. Pokémon Database labels its displayed chart as covering games from 2013 onward and documents earlier changes.
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- Dark and Steel were introduced in Generation 2.
- Fairy was introduced in Generation 6.
- From Generation 6, Ghost- and Dark-type moves deal neutral damage to Steel rather than being resisted.
- Generation 1 had unusual Ghost/Psychic and Bug/Poison interactions that do not match the modern chart.
The official Pokémon chart lists 18 types and specifically cautions that type affinity may differ by game. For a guide to an older title, use that title’s generation-specific chart.
Quick Recap
A quick method for battle decisions
- Read the move’s type, not just its name or the user’s type.
- Identify every defending type, including a secondary type.
- Check for an immunity before looking for weaknesses.
- Multiply the defensive factors for dual-type targets.
- Consider STAB and relevant abilities separately.
- Confirm the generation or game if the matchup involves an older title or a changed interaction.
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