Pokémon Types and Battle Mechanics: The Complete Guide

A Pokémon battle plays out on three layers: the type, which decides how effective a move is; the ability, which bends the rules; and the generation mechanic — Mega Evolution, Dynamax, Terastal — which changes everything for the length of a battle. This page brings them all together.

The 18 types

Eighteen types, one effectiveness chart, and one simple rule: a move can be super effective, not very effective, or have no effect at all. The Fairy type is the latest arrival, added in the sixth generation to rein in Dragons that had become unmanageable. Dark and Steel had appeared in the second, for the same reason, as an answer to Psychic types.

Immunities are what players forget most often: Ground doesn't touch Flying, Electric doesn't touch Ground, Normal and Fighting don't touch Ghost, and Psychic doesn't touch Dark. The full chart is detailed in Pokémon types.

Moves: physical, special, status

Up to the third generation, a move's type decided its category. Since Diamond and Pearl, each move has its own category — physical, special or status — regardless of its type. That change saved dozens of species whose stats didn't match their moves.

See Pokémon moves.

Abilities

Introduced in the third generation, abilities are passive effects that apply without costing a turn. Some are trivial, others completely change an encounter: Levitate cancels Ground moves, Intimidate lowers the opponent's Attack on entry, and Drought and Drizzle set the weather the moment their user reaches the field.

Every species has one or two standard abilities, and often a hidden ability, obtained through specific methods. See Pokémon abilities.

Natures, IVs and EVs

Two Pokémon of the same species and the same level are never identical. Three layers stack up: the nature, which raises one stat by 10% and lowers another; the IVs, an innate potential rolled at random; and the EVs, earned in battle and assigned by the player.

The full calculation is explained in Natures, IVs, EVs and stats.

Status conditions

Burn, poison, paralysis, freeze and sleep are the five main status conditions. They don't stack with one another, but they do add to field effects such as confusion or Torment. They are as useful defensively as offensively: a well-timed paralysis is often worth more than an attack.

See Status conditions in battle.

Weather and terrain

Rain, sun, sandstorm and snow change how much damage moves deal, and sometimes stats too. Since the seventh generation, four terrains have joined them — Electric, Psychic, Grassy and Misty — and they only affect Pokémon on the ground. Building a team around a weather condition is still one of the most solid strategies in competitive play.

See Weather and terrain in battle.

Held items

A Pokémon can hold only one item, which makes the choice decisive. Healing Berries, Leftovers, orbs, belts and incenses cover very different roles; some items trigger an evolution, others lock you into a single move in exchange for a big bonus.

See Held items.

Evolving

Leveling up is only one mechanism among many. An evolution can depend on a stone, on friendship, on the time of day, the location, the gender, an item held during a trade, or even the way you hold the console. Eevee alone illustrates eight of them.

See How Pokémon evolve to Eevee and its eight evolutions.

Mega, Dynamax, Terastal

Since the sixth generation, every generation has brought its own temporary transformation, then dropped it in the next one.

Terastal is the most radical of the three: it doesn't power a Pokémon up, it changes its type, which turns how you read the effectiveness chart upside down in the middle of a battle.

Poké Balls

Not all Poké Balls are equal: some depend on the location, the time of day, the number of turns that have gone by, or the target's weight. Collectors also pick them for their looks, since the Ball stays tied to the Pokémon for life.

See Poké Balls.

18 types: the backbone of every battle

Eighteen types shape every showdown today: Normal, Fire, Water, Grass, Electric, Ice, Fighting, Poison, Ground, Flying, Psychic, Bug, Rock, Ghost, Dragon, Dark, Steel and Fairy. Knowing them means anticipating how a duel will end before you even use your first move.

Every Pokémon has one or two types, and every move belongs to a type as well. The game then compares the move's type with the defender's to decide whether the hit hurts badly, barely grazes, or does nothing at all. This mechanic has stayed the heart of strategy ever since the very first generation.

The first fifteen types were already there in Pokémon Red and Blue. The second generation added Steel and Dark, and then you had to wait for the sixth to see the last one appear, the Fairy type. This slow build explains why the chart sometimes looks unbalanced: it was adjusted game after game. The mechanics grafted on top of it — abilities, natures, status conditions, weather, Mega Evolution and Terastal — are all gathered in our guide to types and battle mechanics.

Super effective, not very effective: reading the multipliers

The principle comes down to a few numbers. A super effective move deals double damage (×2), while a not very effective one deals only half (×0.5). When nothing applies, damage stays neutral (×1).

One example says it all: a Water move against a Fire Pokémon goes up to ×2, while a Fire move against a Water Pokémon drops to ×0.5. That very imbalance is what makes your choice of move matter more than raw power alone.

Memorizing the whole chart is a feat, since it crosses 18 attacking types with 18 defending ones. The better method is to remember a few solid landmarks — the weaknesses of the types you run into most — and to think in families rather than cell by cell.

Immunities: when a move deals no damage at all

Beyond ×2 and ×0.5, some pairings end up at ×0: the move does absolutely nothing. These immunities are rare but decisive, because they can wipe out an opponent's whole strategy in one go.

The best-known cases involve ghosts and spirits: the Normal and Fighting types have no effect on a Ghost Pokémon, and conversely a Ghost move cannot touch a Normal Pokémon. The two sides pass right through each other without doing any harm.

Other immunities come down to physical logic. A Ground move never reaches Flying Pokémon, which stay out of range, and the current of an Electric move does not pass through a Ground Pokémon, which is perfectly grounded. Finally, a Psychic move has no effect on Dark types, and Poison can do nothing against Steel.

⚔️ Want to replay these type matchups in your living room? Check out our collectible Pokémon figures.

The starter triangle and the dual-type trap

The most intuitive foundation of the whole system is still the starter triangle : Grass beats Water, Water beats Fire, and Fire beats Grass. Ever since Kanto, the first choice of an adventure has rested on this three-way balance, which gives everyone their favorite starter Pokémon.

Things get trickier with dual types. When a Pokémon carries two types, the modifiers multiply together. A move that is super effective against both types climbs to ×4, while a move resisted twice drops to ×0.25.

That is what explains some spectacular weak spots. A Rock/Ground Pokémon, for instance, takes a Water move at ×4 and can be knocked out in a single hit. Mastering dual types turns the chart into a real tactical weapon.

The Fairy type: Generation 6's great rebalancing

Before the sixth generation, the Dragon type ruled almost unchallenged: only Ice and Dragon moves themselves really gave it trouble. So the developers brought in the Fairy type to make competitive play more balanced.

The fix had two parts. The Fairy type hits Dragons super effectively, and above all a Dragon move has no effect on a Fairy. That impassable wall was enough to bring Dragons back into line, while also giving players an answer to Fighting and Dark.

From Clefairy to Gardevoir, these charming creatures quickly became fan favorites, in battle as much as on the shelf in the form of super-soft plushies. Fairy proved that a single type could reshuffle the deck of an entire game.

The 18 types and their defensive weaknesses

In short

The type chart is not a list to learn by heart, but a logic to understand : a few families, a few immunities and the instinct to check for dual types are enough to transform every battle. Once you have this system in your head, you never look at a Pokémon the same way again, and you can tell at a glance who will come out on top.

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In the shop

The mechanics show up mostly in merchandise: Poké Ball-shaped AirPods cases, keychain, pin to figures in Mega or Gigantamax forms.

See Pokémon accessories

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Explore the Pokémon universe

This page is part of a series of guides covering the whole Pokémon universe:

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Frequently Asked Questions