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Pokémon/Pokédex/Types
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Each Pokémon has one or two types, and each move has a type. Every move would effect most Pokémon the normal amount, but some types would be "weak" to it, i.e it would do twice the amount of damage, and other types would be "resistant" to it, i.e the move would only do half the damage. Note that if the move is strong enough, even half of it can be very powerful. Then a few types were "immune" to specific types, i.e moves of that type wouldn't damage them.
If a Pokémon has two types, things get more complicated. What happens is that each type is effected separately by the move, and the results are multiplied. So if one type is effected normally by the move, ignore it. If one type is immune to the move, ignore the other one. If both types are weak, the move does 4 times the damage. If both types are resistant, the move does a quarter damage. And if one type is weak and the other is resistant, they cancel each other and the Pokémon is effected normally.
Pokémon by type
Grass-type Pokémon
Fire-type Pokémon
Water-type Pokémon
Bug-type Pokémon
Normal-type Pokémon
Steel-type Pokémon
Ghost-type Pokémon
Psychic-type Pokémon
Dark-type Pokémon
Dragon-type Pokémon
Electric-type Pokémon
Fighting-type Pokémon
Ice-type Pokémon
Fairy-type Pokémon
Poison-type Pokémon
Rock-type Pokémon
Ground-type Pokémon
Flying-type Pokémon
Unused types
Bird type - Included in the first games, this type is only used by the glitch Pokémon Missingno.
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