Pokemon Weakness Calculator

Calculate exact defensive damage multipliers across all 18 Pokemon types. Discover 4x double weaknesses, resistances, and immunities for any single or dual typing from Gen 1 to Gen 9.

Primary Type
Secondary Type (Optional)
Selected Typing: Water
4x Damage Double Weakness (Extreme Vulnerability)
2x Damage Super Effective Weakness
½x Damage Resistances (Not Very Effective)
¼x Damage Double Resistance (Heavily Resisted)
0x Damage Immunities (Zero Damage)
1x Damage Neutral Damage Types

How the Pokemon Weakness Calculator Computes Matchups

In the competitive Pokemon battle system, defensive type matchups dictate the flow of battle. Every attack inflicts damage modified by the defender's elemental typing. While single-type Pokemon exhibit straightforward strengths and weaknesses, dual-type Pokemon combine two elemental affinities, resulting in cumulative mathematical multipliers.

When an incoming attack type is super-effective (2x) against both of a Pokemon's dual types, the multipliers compound to deal a devastating 4x damage (colloquially called a double weakness). Conversely, if an attack is resisted (0.5x) by both types, damage is reduced to 0.25x. Most crucially, any natural immunity (0x damage) completely negates incoming damage regardless of secondary weaknesses.

Our interactive Pokemon weakness calculator scans all 18 standard types—Normal, Fire, Water, Grass, Electric, Ice, Fighting, Poison, Ground, Flying, Psychic, Bug, Rock, Ghost, Dragon, Steel, Dark, and Fairy—providing real-time mathematical certainty before you commit to a turn in competitive laddering, VGC tournaments, or hardcore Nuzlocke challenges.

Defensive Tier List: Best & Worst Typings

1. Steel / Fairy (Defensive God-Tier): Immune to Dragon and Poison; resists 9 types (Normal, Grass, Ice, Flying, Psychic, Bug, Rock, Dark, Fairy); weak to only Fire and Ground. Example: Zacian-Crowned, Tinkaton.
2. Water / Ground (Single Weakness Bulwark): Immune to Electric; resists Fire, Poison, Rock, and Steel; completely neutral to 12 types; possesses only one weakness (Grass 4x). Example: Swampert, Quagsire, Gastrodon.
3. Ghost / Dark (Zero Weaknesses Prior to Gen 6): Immune to Normal, Fighting, and Psychic; resists Poison; weak solely to Fairy (2x). Example: Sableye, Spiritomb.
4. Grass / Ice & Rock / Psychic (High Hazard Typings): Suffer from 7 distinct elemental weaknesses each, including devastating 4x vulnerabilities to Fire (Grass/Ice) or Bug (Rock/Psychic). Example: Abomasnow, Solrock.

Defensive Synergy Cores: Fire-Water-Grass & Fantasy Cores

High-level trainers rarely analyze a Pokemon's weaknesses in isolation. Instead, competitive team construction relies on interlocking defensive cores where each team member's elemental resistances cover a partner's primary vulnerability:

The Classic FWG Core (Fire - Water - Grass): The foundational elemental triangle of Pokemon. Fire absorbs Grass and Ice moves targeting your Water and Grass Pokemon. Water shields Fire types against Ground, Rock, and Water strikes. Grass walls Electric and Ground attacks threatening Fire and Water allies.
The Modern Fantasy Core (Steel - Fairy - Dragon): The premier competitive tournament backbone. Steel absorbs Dragon and Poison moves targeting your Fairy. Fairy is immune to Dragon moves aimed at your Dragon. Dragon resists Fire, Water, Grass, and Electric moves that threaten your Steel wall.

Abilities That Neutralize Elemental Weaknesses

When using this Pokemon weakness calculator, remember that specific passive abilities can completely overwrite or absorb natural type weaknesses:

Levitate (Ground Immunity): Eliminates Ground-type weaknesses on Electric types like Eelektross (rendering it weakness-free) or Poison/Fire types like Weezing and Rotom-Heat.
Flash Fire & Well-Baked Body (Fire Absorption): Grants complete immunity to Fire attacks, granting an attack boost or defense buff instead. Turns a severe weakness into an offensive advantage.
Volt Absorb & Motor Drive (Electric Healing): Heals HP or increases Speed when struck by Electric moves, completely protecting Water-type or Flying-type Pokemon.
Sap Sipper & Water Absorb (Plant & Water Nullification): Completely negates incoming Grass or Water damage, bolstering single-weakness anchors like Swampert or Azumarill against predicted super-effective hits.

How Competitive Trainers Counter Type Weaknesses

Knowing your Pokemon's weaknesses is only half the battle; building a balanced team requires strategic counter-play:

Defensive Pivoting: Pair a Pokemon with an ally that resists or absorbs its primary weakness. For instance, pair Water/Ground (Grass weakness) with a Fire or Flying ally that resists Grass.
Hold Items (Type-Resist Berries): Equip weakness-reducing berries such as Yache Berry (reduces Ice damage by 50% on Dragon/Ground types like Garchomp) or Rindo Berry to survive surprise super-effective hits.
Terastallization (Gen 9 Strategy): Change defensive typing mid-battle using Terastallization. Shedding a vulnerable 4x typing into a defensive Tera Steel, Water, or Ghost can turn an opponent's predicted knock-out into a game-winning counter-attack.

Frequently Asked Questions About the Pokemon Weakness Calculator

What is a Pokemon weakness calculator?

A Pokemon weakness calculator is an interactive battle tool that computes defensive damage multipliers for any elemental combination across all 18 Pokemon types, showing which attack types deal 4x, 2x, 1x, 0.5x, 0.25x, or 0x damage.

How do dual-type weaknesses work in Pokemon?

Dual-type weaknesses are calculated by multiplying the damage factor of both types together. For example, Water is weak to Grass (2x) and Ground is weak to Grass (2x), so a Water/Ground Pokemon takes 4x damage from Grass-type moves.

What typing has the most weaknesses in Pokemon?

Grass/Psychic, Grass/Ice, Grass/Dark, Rock/Grass, and Rock/Psychic share the record with 7 distinct weaknesses each, making them vulnerable to nearly 40% of all attack types.

What Pokemon typing has only one weakness?

Electric (weak only to Ground), Normal/Ghost (weak only to Dark), Water/Ground (weak only to Grass 4x), Bug/Steel (weak only to Fire 4x), Poison/Dark (weak only to Ground), and Ghost/Dark (weak only to Fairy) have exactly one elemental weakness.

Are immunities preserved when combining dual types?

Yes, in standard Pokemon battle mechanics, an immunity (0x damage) always overrides any weakness or resistance; for example, Flying/Electric takes 0x damage from Ground attacks despite Electric normally being weak to Ground.

What is the best defensive typing in competitive Pokemon?

Steel/Fairy is widely considered the best defensive typing, boasting 2 immunities (Dragon and Poison) and 9 resistances while being weak to only Fire and Ground.

Does this calculator account for Gen 9 Terastallization?

Yes, when a Pokemon Terastallizes into a single Tera Type, select that single type with Secondary Type set to 'None' to instantly see your defensive profile during battle.

How does Wonder Guard affect type weaknesses?

The ability Wonder Guard (exclusive to Shedinja) cancels all non-super-effective damage, meaning the Pokemon only takes damage from attack types listed under the 2x or 4x Weakness categories.

Can a Pokemon have zero weaknesses without abilities?

Prior to Generation 6, Ghost/Dark Pokemon (like Sableye and Spiritomb) had zero weaknesses; however, with the introduction of the Fairy type in Gen 6, all Pokemon typings now possess at least one elemental weakness unless granted an ability like Levitate.

Is this Pokemon weakness calculator completely free?

Yes, the RandomPokemon.net Weakness Calculator is 100% free with no account creation or downloads required, running entirely in your browser.

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