Pokémon/Pokédex/Types

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.